question Re: Impact when rename hbase big table with snapshot command in Archives of Support Questions (Read Only)

Impact when rename hbase big table with snapshot command

Paul Yang — Fri, 16 Sep 2022 09:35:56 GMT

HI, we work on cdh5.3.2-0.98.5 hbase, there is a hbase table has 3TB size. hbase> disable ‘tableName’ hbase> snapshot ‘tableName’, ‘tableSnapshot’ hbase> clone_snapshot ‘tableSnapshot’, ‘newNameSpace:newTableName’ hbase> delete_snapshot ‘tableSnapshot’ hbase> drop ‘tableName‘ We would like to rename use above shell script to change namespace, Is it will take more time to create archive file? is renamed table impact of performance than the original table? etc, scan from PIG job,the behaviour when changing old data. In other words, what is the differnt between the ‘newNameSpace:newTableName’ table and ‘tableName’? Thanks

Re: Impact when rename hbase big table with snapshot command

Harsh J — Tue, 28 Jul 2015 02:54:05 GMT

There will not be a performance difference in the IO paths, as you will
still be using the same HFiles, and they will behave as the same table.

Re: Impact when rename hbase big table with snapshot command

Paul Yang — Tue, 28 Jul 2015 03:36:56 GMT

Thanks for your reply,
What is the behaviour of archive HFile when update the old data?
is it the archive HFile will be changed or move to data namespace folder again when the region was compacted or splited?

Re: Impact when rename hbase big table with snapshot command

Paul Yang — Tue, 28 Jul 2015 08:32:31 GMT

And I would like to make sure that support namespace when rename the table by snapshot. Thanks