[jira] [Commented] (HBASE-14791) [0.98] CopyTable is extremely slow when moving delete markers

["Vikas Vishwakarma (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-14791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14999028#comment-14999028 ] 

Vikas Vishwakarma commented on HBASE-14791:
-------------------------------------------

also thanks to [~sukunaidu@gmail.com] for helping with debugging the issue 

> [0.98] CopyTable is extremely slow when moving delete markers
> -------------------------------------------------------------
>
>                 Key: HBASE-14791
>                 URL: https://issues.apache.org/jira/browse/HBASE-14791
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.16
>            Reporter: Lars Hofhansl
>
> We found that some of our copy table job run for many hours, even when there isn't that much data to copy.
> [~vik.karma] did his magic and found that the issue with copying delete markers (we use raw mode to also move deletes across).
> Looking at the code in 0.98 it's immediately obvious that deletes (unlike puts) are not batched and hence sent to the other side one by one, cause a network RTT for each delete marker.
> Looks like in trunk it's doing the right thing (using BufferedMutators for all mutations in TableOutputFormat). So likely only a 0.98 (and 1.0, 1.1, 1.2?) issue.



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