CODEWITHSUNDEEP
hbase
dh.kim
dh.kim

Reputation: 13

What is the difference between clone_snapshot and copyTable?

I know there are two ways to copy a table from hbase, clone snapshot and copyTable. What is the difference between the two methods?

// clone_snapshot
snapshot 'sourceTable', 'sourceTable-snapshot'
clone_snapshot 'sourceTable-snapshot', 'newTable'

// copyTable
$ hbase org.apache.hadoop.hbase.mapreduce.CopyTable --new.name=newTable sourceTable

Upvotes: 0

Views: 309

Answers (1)

Ramachandran.A.G
Ramachandran.A.G

Reputation: 4948

The internal workings are different. CopyTable is a Map Reduce Job that is submitted that will do the data copy. Snapshotting will take the metadata + the hfile structures and then use that to clone the new table. As a result , there is no impact on the RS.

You can read more on this thread : https://community.cloudera.com/t5/Support-Questions/hbase-table-copy-from-one-cluster-to-other/td-p/157248

Upvotes: 1

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