CODEWITHSUNDEEP
hadoopnosqlhbasebigtablegoogle-cloud-bigtable
Revan
Revan

Reputation: 551

What Happens to Snapshot and newly cloned table after hbase table is deleted

I have following query about hbase snapshot:

If I execute below statement in give order :

hbase> snapshot 'NS1:table1', 'snap_table1'
hbase> disable 'NS1:table1'
hbase> drop 'NS1:table1'
hbase> clone_snapshot 'snap_table1','NS1:table1'`

In this case, Can "NS1:table1" still holds the data from the snapshot even after major compaction ?

Thank you!

Upvotes: 2

Views: 972

Answers (1)

Rahul
Rahul

Reputation: 469

snapshot 'NS1:table1', 'snap_table1' : it will create the snapshot. snapshot data will not take additional space till the hfiles it's referencing is changed due to some reasons(major/minor-compactions). if hfile is changed or table is deleted, it will copy the hfiles to snapshot path.

disable 'NS1:table1' : disable the table. before deleting the table you need to disable it first.

drop 'NS1:table1' : all table data and associated hfds folders will be removed. the referenced hfiles of the snapshot is moved to snapshot path.

clone_snapshot 'snap_table1','NS1:table1' : it will take data from snapshot path and create a table with same data as of the old table(data will be availbale till the snapshhot taken time).

Can "NS1:table1" still holds the data from the snapshot even after major compaction : data will be there even after major compacted.

This answer is based on my experience if any mistakes correct me :)

Thanks & Regards Rahul

Upvotes: 4

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