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From "Alex Araujo (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HBASE-14791) [0.98] CopyTable is extremely slow when moving delete markers
Date Tue, 10 Nov 2015 18:20:11 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alex Araujo reassigned HBASE-14791:
-----------------------------------

    Assignee: Alex Araujo

[~lhofhansl] I can take this

> [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
>            Assignee: Alex Araujo
>
> 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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