Hadoop集群间HBase数据迁移

xiaoxiao2021-02-27  328

背景:HBase Cluster1 -> HBase Cluster2 【利用HBase的Snapshots功能,进行集群之间的HBase数据前移】

1.开启Snapshots功能(0.95及以上版本默认开启了)

<property> <name>hbase.snapshot.enabled</name> <value>true</value> </property>

2. 创建Snapshot(在Cluster1上操作)

$ hbase shell hbase> snapshot 'myTable', 'myTableSnapshot-122112'

3. 执行迁移

3.1 推式(在Cluster1上操作)
$ hbase org.apache.hadoop.hbase.snapshot.ExportSnapshot -snapshot MySnapshot -copy-to hdfs://cluster1:8020/hbase_root_dir -mappers 16
3.2 拉式(在Cluster2上操作)
$ hbase org.apache.hadoop.hbase.snapshot.ExportSnapshot -snapshot MySnapshot -copy-from hdfs://cluster1:8020/hbase_root_dir -copy-to hdfs://cluster2:8020/hbase_root_dir -mappers 16

4. 恢复数据(在Cluster2上操作)

$ hbase shell hbase> restore_snapshot 'myTableSnapshot-122112'
https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.4/bk_hbase_snapshots_guide/content/ch_hbase_snapshots_chapter.html
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