操作流程

前言：近期做了一个项目，由于mysql数据库中的数据比较庞大，考虑转储成sql文件迁移数据比较耗时，我们想到了另一种办法，即直接复制data文件夹下的所有文件以及文件夹到另一台服务器。假设我们是把数据文件从服务器A迁移到服务器B（要保证两台服务器的mysql版本一致，不然会遇到许多未知的问题）

获取数据

想要得到我们需要的数据，就要知道mysql的数据文件位于哪一个目录下：首先进入数据库，然后我们可以用下面的命令获取数据文件位置：

mysql -u root -p#进入数据库命令

mysql> show variables like '%dir%';#查看数据库数据文件位于哪一个目录下

可以看出，我们的数据文件位于/var/lib/mysql/文件夹下，接着我们可以把这个文件夹下面的内容打包压缩拷贝出来：

tar -czvf mysql.tar.gz mysql#将mysql数据文件全部打包成mysql.tar.gz

mv mysql.tar.gz 目标文件夹/文件名#将你打包的数据文件移动到你需要的目录并且拷贝

迁移数据

把数据文件从A服务器拷贝到B服务器后，找到B服务器存放数据文件的目录，把A服务器的数据解压拷贝到B服务器的数据文件目录。
注意：把目录下所有的文件以及文件夹迁移过来后，一定要保证ibdata1的存在，删除ib_logfile0和ib_logfile1文件。

tar -xzvf mysql.tar.gz /var/lib/#解压数据文件到对应的文件夹下面

运行新的数据库

我们迁移数据成功后，可能会遇到很多问题，这时不要怕，出错了我们可以查看出错日志：

cat /var/log/mysql/error.log#在这里可以看到我们启动数据库时错误的原因

如果是权限问题，我们可以用下面的命令解决：

chmod -R 777 /mysql#设置该目录下所有的文件权限

设置完权限后，我们可以启动数据库了

service mysql start#启动数据库，启动完之后，我们就可以进入新的数据库，这时的密码就不是原来数据库的密码了，是新数据库的密码

后记

重启数据库服务时，我遇到了权限问题报错如下：
解决方式就是重新设置该目录的权限。

mysql 迁移数据文件之后报 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:03.127681Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:39:03.127829Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:03.127867Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21236 ...
2020-11-29T01:39:03.130277Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:03.130295Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:03.148672Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:39:03.148715Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:39:03.148722Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:39:03.148727Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:39:03.148732Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:39:03.148737Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:39:03.149605Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:39:03.158912Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:39:03.161199Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:39:03.175956Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:39:03.178432Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:39:03.188551Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:03.188605Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:03.188617Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:39:03.789570Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:39:03.789631Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:39:03.789648Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:39:03.789659Z 0 [ERROR] Aborting2020-11-29T01:39:03.789722Z 0 [Note] Binlog end
2020-11-29T01:39:03.789834Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:39:03.790789Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:39:04.320755Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:39:04.320891Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:04.320926Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21292 ...
2020-11-29T01:39:04.323460Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:04.323478Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:04.325871Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:39:04.325898Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:39:04.325903Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:39:04.325907Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:39:04.325911Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:39:04.325915Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:39:04.326127Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:39:04.326218Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:39:04.327710Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:39:04.335408Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:39:04.337134Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:39:04.347237Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:04.347292Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:04.347300Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:39:04.948228Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:39:04.948290Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:39:04.948307Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:39:04.948319Z 0 [ERROR] Aborting2020-11-29T01:39:04.948380Z 0 [Note] Binlog end
2020-11-29T01:39:04.948537Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:39:04.949484Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:39:05.567996Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:39:05.568116Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:05.568147Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21340 ...
2020-11-29T01:39:05.570398Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:05.570416Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:05.572609Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:39:05.572636Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:39:05.572640Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:39:05.572644Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:39:05.572647Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:39:05.572651Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:39:05.572839Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:39:05.572919Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:39:05.574426Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:39:05.581404Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:39:05.583049Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:39:05.593142Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:05.593181Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:05.593189Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:39:06.193807Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:39:06.193839Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:39:06.193847Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:39:06.193852Z 0 [ERROR] Aborting2020-11-29T01:39:06.193872Z 0 [Note] Binlog end
2020-11-29T01:39:06.193923Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:39:06.194256Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:39:06.566904Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:39:06.567024Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:06.567055Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21401 ...
2020-11-29T01:39:06.569375Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:06.569394Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:06.571552Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:39:06.571577Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:39:06.571581Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:39:06.571585Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:39:06.571588Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:39:06.571600Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:39:06.571790Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:39:06.571868Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:39:06.573424Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:39:06.581070Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:39:06.582785Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:39:06.592919Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:06.592966Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:06.592975Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:39:07.193808Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:39:07.193880Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:39:07.193897Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:39:07.193907Z 0 [ERROR] Aborting2020-11-29T01:39:07.193949Z 0 [Note] Binlog end
2020-11-29T01:39:07.194058Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:39:07.195001Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:39:07.825922Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:39:07.826069Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:07.826108Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21457 ...
2020-11-29T01:39:07.828835Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:07.828858Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:39:07.831298Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:39:07.831329Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:39:07.831334Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:39:07.831338Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:39:07.831341Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:39:07.831345Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:39:07.831558Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:39:07.831648Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:39:07.833391Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:39:07.841574Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:39:07.843510Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:39:07.853570Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:07.853604Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:39:07.853610Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:39:08.454263Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:39:08.454292Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:39:08.454300Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:39:08.454305Z 0 [ERROR] Aborting2020-11-29T01:39:08.454325Z 0 [Note] Binlog end
2020-11-29T01:39:08.454374Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:39:08.454727Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:45:26.600754Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:45:26.600889Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:26.600928Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21600 ...
2020-11-29T01:45:26.603271Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:26.603290Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:26.605510Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:45:26.605534Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:45:26.605539Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:45:26.605542Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:45:26.605545Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:45:26.605548Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:45:26.605746Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:45:26.605825Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:45:26.607314Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:45:26.614435Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:45:26.616243Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:45:26.626400Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:26.626451Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:26.626461Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:45:27.227417Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:45:27.227478Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:45:27.227497Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:45:27.227509Z 0 [ERROR] Aborting2020-11-29T01:45:27.227560Z 0 [Note] Binlog end
2020-11-29T01:45:27.227667Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:45:27.228600Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:45:27.820691Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:45:27.820809Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:27.820840Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21650 ...
2020-11-29T01:45:27.823174Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:27.823191Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:27.825410Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:45:27.825436Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:45:27.825440Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:45:27.825444Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:45:27.825448Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:45:27.825452Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:45:27.825645Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:45:27.825728Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:45:27.827286Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:45:27.834375Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:45:27.836178Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:45:27.846197Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:27.846225Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:27.846233Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:45:28.447299Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:45:28.447365Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:45:28.447411Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:45:28.447424Z 0 [ERROR] Aborting2020-11-29T01:45:28.447482Z 0 [Note] Binlog end
2020-11-29T01:45:28.447636Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:45:28.448700Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:45:29.069504Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:45:29.069637Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:29.069668Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21701 ...
2020-11-29T01:45:29.072002Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:29.072018Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:29.074218Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:45:29.074240Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:45:29.074245Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:45:29.074248Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:45:29.074252Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:45:29.074255Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:45:29.074446Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:45:29.074530Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:45:29.075993Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:45:29.083722Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:45:29.085538Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:45:29.095638Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:29.095678Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:29.095686Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:45:29.696598Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:45:29.696657Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:45:29.696676Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:45:29.696686Z 0 [ERROR] Aborting2020-11-29T01:45:29.696741Z 0 [Note] Binlog end
2020-11-29T01:45:29.696887Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:45:29.697924Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:45:30.321273Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:45:30.321398Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:30.321429Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21753 ...
2020-11-29T01:45:30.323927Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:30.323945Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:30.326199Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:45:30.326224Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:45:30.326228Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:45:30.326231Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:45:30.326235Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:45:30.326238Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:45:30.326433Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:45:30.326515Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:45:30.328000Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:45:30.335790Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:45:30.337555Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:45:30.347623Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:30.347652Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:30.347659Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:45:30.948581Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:45:30.948654Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:45:30.948673Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:45:30.948682Z 0 [ERROR] Aborting2020-11-29T01:45:30.948728Z 0 [Note] Binlog end
2020-11-29T01:45:30.948838Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:45:30.949833Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T01:45:31.569272Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T01:45:31.569399Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:31.569431Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 21806 ...
2020-11-29T01:45:31.571911Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:31.571930Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T01:45:31.574424Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T01:45:31.574454Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T01:45:31.574459Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T01:45:31.574462Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T01:45:31.574466Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T01:45:31.574469Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T01:45:31.574662Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T01:45:31.574758Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T01:45:31.576441Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T01:45:31.583908Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T01:45:31.585742Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T01:45:31.595826Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:31.595861Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T01:45:31.595869Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T01:45:32.196746Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T01:45:32.196808Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T01:45:32.196828Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T01:45:32.196840Z 0 [ERROR] Aborting2020-11-29T01:45:32.196886Z 0 [Note] Binlog end
2020-11-29T01:45:32.196982Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T01:45:32.197703Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:10:55.990245Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:10:55.990407Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:55.990459Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 23198 ...
2020-11-29T02:10:55.992987Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:55.993008Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:56.031542Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:10:56.031595Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:10:56.031602Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:10:56.031607Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:10:56.031612Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:10:56.031617Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:10:56.032549Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:10:56.041730Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:10:56.043535Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:10:56.051879Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:10:56.053981Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:10:56.064089Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:56.064130Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:56.064138Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:10:56.665112Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:10:56.665172Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:10:56.665189Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:10:56.665200Z 0 [ERROR] Aborting2020-11-29T02:10:56.665248Z 0 [Note] Binlog end
2020-11-29T02:10:56.665354Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:10:56.667012Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:10:57.120401Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:10:57.120526Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:57.120557Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 23246 ...
2020-11-29T02:10:57.122873Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:57.122893Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:57.125112Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:10:57.125138Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:10:57.125142Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:10:57.125145Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:10:57.125149Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:10:57.125152Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:10:57.125344Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:10:57.125428Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:10:57.126914Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:10:57.134333Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:10:57.136146Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:10:57.146227Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:57.146262Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:57.146267Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:10:57.747221Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:10:57.747281Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:10:57.747299Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:10:57.747310Z 0 [ERROR] Aborting2020-11-29T02:10:57.747363Z 0 [Note] Binlog end
2020-11-29T02:10:57.747519Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:10:57.748485Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:10:58.320986Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:10:58.321109Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:58.321141Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 23297 ...
2020-11-29T02:10:58.323535Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:58.323556Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:58.325759Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:10:58.325779Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:10:58.325784Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:10:58.325787Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:10:58.325790Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:10:58.325794Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:10:58.325987Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:10:58.326072Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:10:58.327524Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:10:58.334962Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:10:58.336736Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:10:58.346865Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:58.346912Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:58.346922Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:10:58.947845Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:10:58.947907Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:10:58.947925Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:10:58.947936Z 0 [ERROR] Aborting2020-11-29T02:10:58.947992Z 0 [Note] Binlog end
2020-11-29T02:10:58.948139Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:10:58.949144Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:10:59.568641Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:10:59.568766Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:59.568797Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 23351 ...
2020-11-29T02:10:59.571136Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:59.571155Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:10:59.573351Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:10:59.573378Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:10:59.573382Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:10:59.573386Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:10:59.573389Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:10:59.573393Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:10:59.573585Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:10:59.573695Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:10:59.575186Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:10:59.582874Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:10:59.584580Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:10:59.594699Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:59.594757Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:10:59.594766Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:11:00.195640Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:11:00.195716Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:11:00.195764Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:11:00.195787Z 0 [ERROR] Aborting2020-11-29T02:11:00.195859Z 0 [Note] Binlog end
2020-11-29T02:11:00.196025Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:11:00.196607Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:11:00.820648Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:11:00.820778Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:11:00.820810Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 23406 ...
2020-11-29T02:11:00.823069Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:11:00.823086Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:11:00.825326Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:11:00.825350Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:11:00.825354Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:11:00.825357Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:11:00.825361Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:11:00.825364Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:11:00.825556Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:11:00.825638Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:11:00.827097Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:11:00.834317Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:11:00.836079Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:11:00.846215Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:11:00.846263Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:11:00.846273Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:11:01.447259Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:11:01.447319Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:11:01.447337Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:11:01.447348Z 0 [ERROR] Aborting2020-11-29T02:11:01.447402Z 0 [Note] Binlog end
2020-11-29T02:11:01.447544Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:11:01.448570Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:23:54.479652Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:23:54.479864Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:54.479919Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 1695 ...
2020-11-29T02:23:54.483611Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:54.483646Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:54.613562Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:23:54.613598Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:23:54.613606Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:23:54.613613Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:23:54.613619Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:23:54.613639Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:23:54.613944Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:23:54.922566Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:23:54.924113Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:23:54.993205Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:23:54.995820Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:23:55.005865Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:55.005899Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:55.005909Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:23:55.606365Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:23:55.606388Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:23:55.606395Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:23:55.606400Z 0 [ERROR] Aborting2020-11-29T02:23:55.606420Z 0 [Note] Binlog end
2020-11-29T02:23:55.606465Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:23:55.606795Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:23:56.231846Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:23:56.232041Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:56.232086Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 3065 ...
2020-11-29T02:23:56.235052Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:56.235074Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:56.237468Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:23:56.237488Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:23:56.237493Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:23:56.237497Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:23:56.237502Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:23:56.237507Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:23:56.237730Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:23:56.237827Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:23:56.241071Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:23:56.254291Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:23:56.257772Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:23:56.267814Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:56.267851Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:56.267862Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:23:56.868408Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:23:56.868438Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:23:56.868445Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:23:56.868450Z 0 [ERROR] Aborting2020-11-29T02:23:56.868472Z 0 [Note] Binlog end
2020-11-29T02:23:56.868520Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:23:56.868966Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:23:57.475545Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:23:57.475712Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:57.475755Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 3243 ...
2020-11-29T02:23:57.478372Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:57.478391Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:57.480798Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:23:57.480824Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:23:57.480828Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:23:57.480832Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:23:57.480836Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:23:57.480839Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:23:57.481051Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:23:57.481140Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:23:57.482676Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:23:57.490558Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:23:57.492387Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:23:57.502463Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:57.502498Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:57.502504Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:23:58.103103Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:23:58.103132Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:23:58.103141Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:23:58.103146Z 0 [ERROR] Aborting2020-11-29T02:23:58.103173Z 0 [Note] Binlog end
2020-11-29T02:23:58.103222Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:23:58.103607Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:23:58.736318Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:23:58.736495Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:58.736547Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 3349 ...
2020-11-29T02:23:58.740676Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:58.740711Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:23:58.745019Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:23:58.745058Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:23:58.745066Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:23:58.745070Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:23:58.745074Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:23:58.745078Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:23:58.745366Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:23:58.745491Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:23:58.748512Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:23:58.769124Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:23:58.771142Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:23:58.784466Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:58.784500Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:23:58.784509Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:23:59.387999Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:23:59.388042Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:23:59.388052Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:23:59.388058Z 0 [ERROR] Aborting2020-11-29T02:23:59.388076Z 0 [Note] Binlog end
2020-11-29T02:23:59.388123Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:23:59.388484Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:24:00.009830Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:24:00.009991Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:24:00.010035Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 3576 ...
2020-11-29T02:24:00.013221Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:24:00.013242Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:24:00.015405Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:24:00.015431Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:24:00.015435Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:24:00.015438Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:24:00.015442Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:24:00.015445Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:24:00.015634Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:24:00.015764Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:24:00.017247Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:24:00.025473Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:24:00.027815Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:24:00.037939Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:24:00.037990Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:24:00.037999Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:24:00.638724Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:24:00.638755Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:24:00.638764Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:24:00.638768Z 0 [ERROR] Aborting2020-11-29T02:24:00.638784Z 0 [Note] Binlog end
2020-11-29T02:24:00.638833Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:24:00.639188Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:26:26.507462Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:26:26.507614Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:26.507650Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 10930 ...
2020-11-29T02:26:26.510374Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:26.510402Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:26.512834Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:26:26.512867Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:26:26.512872Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:26:26.512877Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:26:26.512881Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:26:26.512886Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:26:26.513101Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:26:26.513193Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:26:26.514797Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:26:26.522732Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:26:26.524579Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:26:26.534671Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:26.534709Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:26.534717Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:26:27.135270Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:26:27.135292Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:26:27.135300Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:26:27.135305Z 0 [ERROR] Aborting2020-11-29T02:26:27.135334Z 0 [Note] Binlog end
2020-11-29T02:26:27.135385Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:26:27.137486Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:26:27.735143Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:26:27.735275Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:27.735308Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 10995 ...
2020-11-29T02:26:27.737836Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:27.737855Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:27.740214Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:26:27.740242Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:26:27.740247Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:26:27.740251Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:26:27.740255Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:26:27.740259Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:26:27.740470Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:26:27.740558Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:26:27.742131Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:26:27.750147Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:26:27.751950Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:26:27.762009Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:27.762039Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:27.762044Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:26:28.362605Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:26:28.362640Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:26:28.362650Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:26:28.362656Z 0 [ERROR] Aborting2020-11-29T02:26:28.362680Z 0 [Note] Binlog end
2020-11-29T02:26:28.362738Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:26:28.363123Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:26:28.727886Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:26:28.728013Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:28.728043Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 11060 ...
2020-11-29T02:26:28.730286Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:28.730303Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:28.732498Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:26:28.732525Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:26:28.732529Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:26:28.732532Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:26:28.732536Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:26:28.732539Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:26:28.732727Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:26:28.732807Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:26:28.734365Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:26:28.742145Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:26:28.743882Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:26:28.754009Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:28.754059Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:28.754068Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:26:29.354638Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:26:29.354673Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:26:29.354680Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:26:29.354684Z 0 [ERROR] Aborting2020-11-29T02:26:29.354707Z 0 [Note] Binlog end
2020-11-29T02:26:29.354765Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:26:29.355555Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:26:29.727051Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:26:29.727185Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:29.727219Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 11117 ...
2020-11-29T02:26:29.729775Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:29.729797Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:29.732208Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:26:29.732240Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:26:29.732245Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:26:29.732249Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:26:29.732252Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:26:29.732256Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:26:29.732466Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:26:29.732554Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:26:29.734249Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:26:29.742297Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:26:29.744173Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:26:29.754236Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:29.754257Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:29.754263Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:26:30.354922Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:26:30.354971Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:26:30.354984Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:26:30.354991Z 0 [ERROR] Aborting2020-11-29T02:26:30.355034Z 0 [Note] Binlog end
2020-11-29T02:26:30.355143Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:26:30.355863Z 0 [Note] /usr/sbin/mysqld: Shutdown complete2020-11-29T02:26:30.733892Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-11-29T02:26:30.734028Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:30.734061Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.26-0ubuntu0.18.04.1) starting as process 11174 ...
2020-11-29T02:26:30.736633Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:30.736656Z 0 [Warning] Can't create test file /var/lib/mysql/localhost.lower-test
2020-11-29T02:26:30.739003Z 0 [Note] InnoDB: PUNCH HOLE support available
2020-11-29T02:26:30.739036Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2020-11-29T02:26:30.739040Z 0 [Note] InnoDB: Uses event mutexes
2020-11-29T02:26:30.739044Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2020-11-29T02:26:30.739047Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-11-29T02:26:30.739051Z 0 [Note] InnoDB: Using Linux native AIO
2020-11-29T02:26:30.739262Z 0 [Note] InnoDB: Number of pools: 1
2020-11-29T02:26:30.739347Z 0 [Note] InnoDB: Using CPU crc32 instructions
2020-11-29T02:26:30.742119Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2020-11-29T02:26:30.749714Z 0 [Note] InnoDB: Completed initialization of buffer pool
2020-11-29T02:26:30.751506Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2020-11-29T02:26:30.761574Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:30.761595Z 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable
2020-11-29T02:26:30.761600Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2020-11-29T02:26:31.362187Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2020-11-29T02:26:31.362209Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2020-11-29T02:26:31.362215Z 0 [ERROR] Failed to initialize builtin plugins.
2020-11-29T02:26:31.362218Z 0 [ERROR] Aborting2020-11-29T02:26:31.362234Z 0 [Note] Binlog end
2020-11-29T02:26:31.362281Z 0 [Note] Shutting down plugin 'CSV'
2020-11-29T02:26:31.362643Z 0 [Note] /usr/sbin/mysqld: Shutdown complete

1.data文件夹文件列表简要说明

1>.data文件夹下的文件夹对应Mysql数据库中的数据库，但文件夹中的每个frm文件又对应数据表的schema表结构，不含数据记录；

2>.data目录下的ibdata文件保存数据库中所有数据表的记录数据（看它的大小就知道这家伙是保存数据的）

3>.ib_logfile记录一些没有提交的数据，表损坏的时候，可以用这些东东来恢复。

2.备份：直接将data文件夹全部打包备份起来，注意一定不要丢掉ibdata文件，ib_logfile视情况而定；

3.还原：把我们备份的文件按照上述备份时的目录结构还原回去；

4.优点：备份难度低，对于要对整个数据库备份的情景较为合适；
5.缺点：如果要对某一个数据库进行备份的话，不能实现；

每次被导师逼急了问题就都解决了

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