小丸子学Hadoop系列之——hbase备份与恢复
--查看原始数据
[hdpusr01@hadoop1 bin]$ hbase shell
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/hdpusr01/hbase-1.0.3/lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/hdpusr01/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
HBase Shell; enter 'help' for list of supported commands.
Type "exit" to leave the HBase Shell
Version 1.0.3, rf1e1312f9790a7c40f6a4b5a1bab2ea1dd559890, Tue Jan 19 19:26:53 PST 2016
hbase(main):001:0> list
TABLE
member
1 row(s) in 0.2860 seconds
=> ["member"]
hbase(main):002:0> scan 'member'
ROW COLUMN+CELL
rowkey-1 column=common:city, timestamp=1469089923121, value=beijing
rowkey-1 column=person:age, timestamp=1469089899438, value=20
rowkey-2 column=common:country, timestamp=1469090319844, value=china
rowkey-2 column=person:sex, timestamp=1469090247393, value=man
2 row(s) in 0.0940 seconds
--关闭hbase
[hdpusr01@hadoop1 bin]$ stop-hbase.sh
stopping hbase................
--查看distcp的帮助
[hdpusr01@hadoop1 bin]$ hadoop distcp
usage: distcp OPTIONS [source_path...]
OPTIONS
-append Reuse existing data in target files and append new
data to them if possible
-async Should distcp execution be blocking
-atomic Commit all changes or none
-bandwidth Specify bandwidth per map in MB
-delete Delete from target, files missing in source
-f List of files that need to be copied
-filelimit (Deprecated!) Limit number of files copied to <= n
-i Ignore failures during copy
-log Folder on DFS where distcp execution logs are
saved
-m Max number of concurrent maps to use for copy
-mapredSslConf Configuration for ssl config file, to use with
hftps://
-overwrite Choose to overwrite target files unconditionally,
even if they exist.
-p preserve status (rbugpcaxt)(replication,
block-size, user, group, permission,
checksum-type, ACL, XATTR, timestamps). If -p is
specified with no , then preserves
replication, block size, user, group, permission,
checksum type and timestamps. raw.* xattrs are
preserved when both the source and destination
paths are in the /.reserved/raw hierarchy (HDFS
only). raw.* xattrpreservation is independent of
the -p flag. Refer to the DistCp documentation for
more details.
-sizelimit (Deprecated!) Limit number of files copied to <= n
bytes
-skipcrccheck Whether to skip CRC checks between source and
target paths.
-strategy Copy strategy to use. Default is dividing work
based on file sizes
-tmp Intermediate work path to be used for atomic
commit
-update Update target, copying only missingfiles or
directories
--备份hbase
[hdpusr01@hadoop1 bin]$ hdfs dfs -ls /
Found 3 items
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 02:39 /hbase
drwx-wx-wx - hdpusr01 supergroup 0 2016-05-23 12:25 /tmp
drwxr-xr-x - hdpusr01 supergroup 0 2016-06-25 03:12 /user
[hdpusr01@hadoop1 ~]$ hadoop distcp /hbase /hbasebak
16/07/25 03:07:58 INFO tools.DistCp: Input Options: DistCpOptions{atomicCommit=false, syncFolder=false, deleteMissing=false, ignoreFailures=false, maxMaps=20, sslConfigurationFile='null', copyStrategy='uniformsize', sourceFileListing=null, sourcePaths=[/hbase], targetPath=/hbasebak, targetPathExists=false, preserveRawXattrs=false}
16/07/25 03:07:58 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
16/07/25 03:08:00 INFO Configuration.deprecation: io.sort.mb is deprecated. Instead, use mapreduce.task.io.sort.mb
16/07/25 03:08:00 INFO Configuration.deprecation: io.sort.factor is deprecated. Instead, use mapreduce.task.io.sort.factor
16/07/25 03:08:02 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
16/07/25 03:08:03 INFO mapreduce.JobSubmitter: number of splits:13
16/07/25 03:08:05 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1469176015126_0002
16/07/25 03:08:05 INFO impl.YarnClientImpl: Submitted application application_1469176015126_0002
16/07/25 03:08:05 INFO mapreduce.Job: The url to track the job: http://hadoop1:8088/proxy/application_1469176015126_0002/
16/07/25 03:08:05 INFO tools.DistCp: DistCp job-id: job_1469176015126_0002
16/07/25 03:08:05 INFO mapreduce.Job: Running job: job_1469176015126_0002
16/07/25 03:08:10 INFO mapreduce.Job: Job job_1469176015126_0002 running in uber mode : false
16/07/25 03:08:10 INFO mapreduce.Job: map 0% reduce 0%
16/07/25 03:08:25 INFO mapreduce.Job: map 4% reduce 0%
16/07/25 03:08:26 INFO mapreduce.Job: map 10% reduce 0%
16/07/25 03:08:28 INFO mapreduce.Job: map 14% reduce 0%
16/07/25 03:09:02 INFO mapreduce.Job: map 15% reduce 0%
16/07/25 03:09:19 INFO mapreduce.Job: map 16% reduce 0%
16/07/25 03:09:20 INFO mapreduce.Job: map 38% reduce 0%
16/07/25 03:09:21 INFO mapreduce.Job: map 46% reduce 0%
16/07/25 03:09:34 INFO mapreduce.Job: map 54% reduce 0%
16/07/25 03:09:35 INFO mapreduce.Job: map 92% reduce 0%
16/07/25 03:09:38 INFO mapreduce.Job: map 100% reduce 0%
16/07/25 03:09:39 INFO mapreduce.Job: Job job_1469176015126_0002 completed successfully
16/07/25 03:09:39 INFO mapreduce.Job: Counters: 33
File System Counters
FILE: Number of bytes read=0
FILE: Number of bytes written=1404432
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=57852
HDFS: Number of bytes written=41057
HDFS: Number of read operations=378
HDFS: Number of large read operations=0
HDFS: Number of write operations=99
...
[hdpusr01@hadoop1 ~]$ hdfs dfs -ls /
Found 4 items
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 02:39 /hbase
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:09 /hbasebak
drwx-wx-wx - hdpusr01 supergroup 0 2016-05-23 12:25 /tmp
drwxr-xr-x - hdpusr01 supergroup 0 2016-06-25 03:12 /user
[hdpusr01@hadoop1 ~]$ hdfs dfs -ls /hbasebak
Found 8 items
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:08 /hbasebak/.tmp
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:08 /hbasebak/WALs
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:08 /hbasebak/archive
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:08 /hbasebak/corrupt
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:08 /hbasebak/data
-rw-r--r-- 1 hdpusr01 supergroup 42 2016-07-25 03:09 /hbasebak/hbase.id
-rw-r--r-- 1 hdpusr01 supergroup 7 2016-07-25 03:09 /hbasebak/hbase.version
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:09 /hbasebak/oldWALs
--启动hbase
[hdpusr01@hadoop1 bin]$ ./start-hbase.sh
starting master, logging to /home/hdpusr01/hbase-1.0.3/bin/../logs/hbase-hdpusr01-master-hadoop1.out
starting regionserver, logging to /home/hdpusr01/hbase-1.0.3/bin/../logs/hbase-hdpusr01-1-regionserver-hadoop1.out
--删除hbase中的表
hbase(main):001:0> list
TABLE
member
1 row(s) in 0.1850 seconds
=> ["emp"]
hbase(main):002:0> drop 'emp'
ERROR: Table emp is enabled. Disable it first.
Here is some help for this command:
Drop the named table. Table must first be disabled:
hbase> drop 't1'
hbase> drop 'ns1:t1'
hbase(main):003:0> disable 'emp'
0 row(s) in 1.1880 seconds
hbase(main):004:0> drop 'emp'
0 row(s) in 4.2010 seconds
hbase(main):005:0> list
TABLE
0 row(s) in 0.0060 seconds
=> []
--关闭hbase
[hdpusr01@hadoop1 bin]$ ./stop-hbase.sh
stopping hbase..................
[hdpusr01@hadoop1 bin]$ hdfs dfs -ls /
Found 4 items
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:11 /hbase
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:09 /hbasebak
drwx-wx-wx - hdpusr01 supergroup 0 2016-05-23 12:25 /tmp
drwxr-xr-x - hdpusr01 supergroup 0 2016-06-25 03:12 /user
[hdpusr01@hadoop1 bin]$ hdfs dfs -mv /hbase /hbase.old
[hdpusr01@hadoop1 bin]$ hdfs dfs -mv /hbasebak /hbase
[hdpusr01@hadoop1 bin]$ hdfs dfs -ls /
Found 4 items
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:09 /hbase
drwxr-xr-x - hdpusr01 supergroup 0 2016-07-25 03:11 /hbase.old
drwx-wx-wx - hdpusr01 supergroup 0 2016-05-23 12:25 /tmp
drwxr-xr-x - hdpusr01 supergroup 0 2016-06-25 03:12 /user
#除了上面的方法之外还可以使用distcp的overwriter参数还原数据
[hdpusr01@hadoop1 bin]$ hadoop distcp -overwrite /hbasebak /hbase
16/07/25 03:42:48 INFO tools.DistCp: Input Options: DistCpOptions{atomicCommit=false, syncFolder=false, deleteMissing=false, ignoreFailures=false, maxMaps=20, sslConfigurationFile='null', copyStrategy='uniformsize', sourceFileListing=null, sourcePaths=[/hbasebak], targetPath=/hbase, targetPathExists=true, preserveRawXattrs=false}
16/07/25 03:42:48 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
16/07/25 03:42:51 INFO Configuration.deprecation: io.sort.mb is deprecated. Instead, use mapreduce.task.io.sort.mb
16/07/25 03:42:51 INFO Configuration.deprecation: io.sort.factor is deprecated. Instead, use mapreduce.task.io.sort.factor
16/07/25 03:42:52 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
16/07/25 03:43:14 INFO mapreduce.JobSubmitter: number of splits:12
16/07/25 03:43:22 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1469176015126_0003
16/07/25 03:43:23 INFO impl.YarnClientImpl: Submitted application application_1469176015126_0003
16/07/25 03:43:23 INFO mapreduce.Job: The url to track the job: http://hadoop1:8088/proxy/application_1469176015126_0003/
16/07/25 03:43:23 INFO tools.DistCp: DistCp job-id: job_1469176015126_0003
16/07/25 03:43:23 INFO mapreduce.Job: Running job: job_1469176015126_0003
16/07/25 03:43:29 INFO mapreduce.Job: Job job_1469176015126_0003 running in uber mode : false
16/07/25 03:43:29 INFO mapreduce.Job: map 0% reduce 0%
。。。
16/07/25 03:45:27 INFO mapreduce.Job: map 82% reduce 0%
16/07/25 03:45:32 INFO mapreduce.Job: map 92% reduce 0%
16/07/25 03:45:39 INFO mapreduce.Job: map 100% reduce 0%
16/07/25 03:45:47 INFO mapreduce.Job: Job job_1469176015126_0003 completed successfully
16/07/25 03:45:47 INFO mapreduce.Job: Counters: 33
。。。
--启动hbase
[hdpusr01@hadoop1 bin]$ ./start-hbase.sh
starting master, logging to /home/hdpusr01/hbase-1.0.3/bin/../logs/hbase-hdpusr01-master-hadoop1.out
starting regionserver, logging to /home/hdpusr01/hbase-1.0.3/bin/../logs/hbase-hdpusr01-1-regionserver-hadoop1.out
--验证数据
[hdpusr01@hadoop1 bin]$ hbase shell
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/hdpusr01/hbase-1.0.3/lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/hdpusr01/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
HBase Shell; enter 'help' for list of supported commands.
Type "exit" to leave the HBase Shell
Version 1.0.3, rf1e1312f9790a7c40f6a4b5a1bab2ea1dd559890, Tue Jan 19 19:26:53 PST 2016
hbase(main):001:0> list
TABLE
emp
1 row(s) in 0.2090 seconds
=> ["emp"]
hbase(main):002:0> scan 'emp'
ROW COLUMN+CELL
6379 column=info:salary, timestamp=1469428164465, value=10000
7822 column=info:ename, timestamp=1469428143019, value=tanlei
8899 column=info:job, timestamp=1469428186434, value=IT Engineer
3 row(s) in 0.1220 seconds
注意：通过distcp的overwirte参数还原后hbase中的数据可以正常显示，但是存在zookeeper中的/hbase/table节点下的关于emp的元数据不见了，而通过hdfs dfs -mv操作直接还原后在zookeeper中的元数据却存在。
2.使用CopyTable热备hbase
--创建新表
hbase(main):004:0> create 'emp2','info'
0 row(s) in 0.7300 seconds
--查看CopyTable的帮助
[hdpusr01@hadoop1 ~]$ hbase org.apache.hadoop.hbase.mapreduce.CopyTable --help
Usage: CopyTable [general options] [--starttime=X] [--endtime=Y] [--new.name=NEW] [--peer.adr=ADR]
Options:
rs.class hbase.regionserver.class of the peer cluster specify if different from current cluster
rs.impl hbase.regionserver.impl of the peer cluster
startrow the start row
stoprow the stop row
starttime beginning of the time range (unixtime in millis) without endtime means from starttime to forever
endtime end of the time range. Ignored if no starttime specified.
versions number of cell versions to copy
new.name new table's name
peer.adr Address of the peer cluster given in the format hbase.zookeeer.quorum:hbase.zookeeper.client.port:zookeeper.znode.parent
families comma-separated list of families to copy
To copy from cf1 to cf2, give sourceCfName:destCfName.
To keep the same name, just give "cfName"
all.cells also copy delete markers and deleted cells
bulkload Write input into HFiles and bulk load to the destination table
Args:
tablename Name of the table to copy
Examples:
To copy 'TestTable' to a cluster that uses replication for a 1 hour window:
$ bin/hbase org.apache.hadoop.hbase.mapreduce.CopyTable --starttime=1265875194289 --endtime=1265878794289 --peer.adr=server1,server2,server3:2181:/hbase --families=myOldCf:myNewCf,cf2,cf3 TestTable
For performance consider the following general option:
It is recommended that you set the following to >=100. A higher value uses more memory but
decreases the round trip time to the server and may increase performance.
-Dhbase.client.scanner.caching=100
The following should always be set to false, to prevent writing data twice, which may produce
inaccurate results.
-Dmapreduce.map.speculative=false
--使用CopyTable拷贝数据到新表
hdpusr01@hadoop1 ~]$ hbase org.apache.hadoop.hbase.mapreduce.CopyTable --new.name=emp2 emp
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/hdpusr01/hbase-1.0.3/lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/hdpusr01/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
2016-07-25 07:35:24,955 INFO [main] Configuration.deprecation: io.bytes.per.checksum is deprecated. Instead, use dfs.bytes-per-checksum
2016-07-25 07:35:25,065 INFO [main] client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
2016-07-25 07:35:25,244 INFO [main] Configuration.deprecation: io.bytes.per.checksum is deprecated. Instead, use dfs.bytes-per-checksum
2016-07-25 07:35:30,765 INFO [main] zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0x50965003 connecting to ZooKeeper ensemble=hadoop1:29181
2016-07-25 07:35:30,770 INFO [main] zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
2016-07-25 07:35:30,770 INFO [main] zookeeper.ZooKeeper: Client environment:host.name=hadoop1
2016-07-25 07:35:30,770 INFO [main] zookeeper.ZooKeeper: Client environment:java.version=1.7.0_79
2016-07-25 07:35:33,334 INFO [main] impl.YarnClientImpl: Submitted application application_1469176015126_0006
2016-07-25 07:35:33,360 INFO [main] mapreduce.Job: The url to track the job: http://hadoop1:8088/proxy/application_1469176015126_0006/
2016-07-25 07:35:33,360 INFO [main] mapreduce.Job: Running job: job_1469176015126_0006
2016-07-25 07:35:39,436 INFO [main] mapreduce.Job: Job job_1469176015126_0006 running in uber mode : false
2016-07-25 07:35:39,437 INFO [main] mapreduce.Job: map 0% reduce 0%
2016-07-25 07:35:44,584 INFO [main] mapreduce.Job: map 100% reduce 0%
2016-07-25 07:35:58,657 INFO [main] mapreduce.Job: Job job_1469176015126_0006 completed successfully
。。。
--验证数据
hbase(main):005:0> scan 'emp2'
ROW COLUMN+CELL
6379 column=info:salary, timestamp=1469428164465, value=10000
7822 column=info:ename, timestamp=1469428143019, value=tanlei
8899 column=info:job, timestamp=1469428186434, value=IT Engineer
3 row(s) in 0.0170 seconds
注意：CopyTable可以实现在同一个集群或者不同集群间拷贝数据
3.使用Export热备hbase
--备份表数据
[hdpusr01@hadoop1 ~]$ hbase org.apache.hadoop.hbase.mapreduce.Export emp2 /tmp/emp2
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/hdpusr01/hbase-1.0.3/lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/hdpusr01/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
2016-07-25 09:32:57,375 INFO [main] mapreduce.Export: versions=1, starttime=0, endtime=9223372036854775807, keepDeletedCells=false
2016-07-25 09:32:58,241 INFO [main] client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
2016-07-25 09:32:59,440 INFO [main] zookeeper.RecoverableZooKeeper: Process identifier=hconnection-0x39e4ff0c connecting to ZooKeeper ensemble=hadoop1:29181
2016-07-25 09:32:59,446 INFO [main] zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
2016-07-25 09:32:59,446 INFO [main] zookeeper.ZooKeeper: Client environment:host.name=hadoop1
2016-07-25 09:32:59,446 INFO [main] zookeeper.ZooKeeper: Client environment:java.version=1.7.0_79
。。。
2016-07-25 09:33:00,795 INFO [main] mapreduce.Job: The url to track the job: http://hadoop1:8088/proxy/application_1469176015126_0007/
2016-07-25 09:33:00,796 INFO [main] mapreduce.Job: Running job: job_1469176015126_0007
2016-07-25 09:33:06,968 INFO [main] mapreduce.Job: Job job_1469176015126_0007 running in uber mode : false
2016-07-25 09:33:06,970 INFO [main] mapreduce.Job: map 0% reduce 0%
2016-07-25 09:33:13,028 INFO [main] mapreduce.Job: map 100% reduce 0%
2016-07-25 09:33:13,036 INFO [main] mapreduce.Job: Job job_1469176015126_0007 completed successfully
。。。
--创建新表
hbase(main):010:0> create 'emp3','info'
0 row(s) in 0.1560 seconds
=> Hbase::Table - emp3
--导入数据到新表
[hdpusr01@hadoop1 ~]$ hbase org.apache.hadoop.hbase.mapreduce.Import emp3 /tmp/emp2
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/hdpusr01/hbase-1.0.3/lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/hdpusr01/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
2016-07-25 09:46:30,373 INFO [main] client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
2016-07-25 09:46:31,954 INFO [main] input.FileInputFormat: Total input paths to process : 1
2016-07-25 09:46:32,019 INFO [main] mapreduce.JobSubmitter: number of splits:1
2016-07-25 09:46:32,593 INFO [main] mapreduce.JobSubmitter: Submitting tokens for job: job_1469176015126_0008
2016-07-25 09:46:32,821 INFO [main] impl.YarnClientImpl: Submitted application application_1469176015126_0008
2016-07-25 09:46:32,851 INFO [main] mapreduce.Job: The url to track the job: http://hadoop1:8088/proxy/application_1469176015126_0008/
。。。
2016-07-25 09:46:38,947 INFO [main] mapreduce.Job: Job job_1469176015126_0008 running in uber mode : false
2016-07-25 09:46:38,948 INFO [main] mapreduce.Job: map 0% reduce 0%
2016-07-25 09:46:44,018 INFO [main] mapreduce.Job: map 100% reduce 0%
2016-07-25 09:46:45,030 INFO [main] mapreduce.Job: Job job_1469176015126_0008 completed successfully
。。。
--验证数据
hbase(main):012:0> scan 'emp3'
ROW COLUMN+CELL
6379 column=info:salary, timestamp=1469428164465, value=10000
7822 column=info:ename, timestamp=1469428143019, value=tanlei
8899 column=info:job, timestamp=1469428186434, value=IT Engineer
3 row(s) in 0.0230 seconds
至此：有关hbase热备和冷备的一些方法就介绍到此，还有其他一些技术可以实现hbase的热备这里就不介绍了。
来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/20801486/viewspace-2122530/，如需转载，请注明出处，否则将追究法律责任。
转载于:http://blog.itpub.net/20801486/viewspace-2122530/
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