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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-14791) [0.98] CopyTable is extremely slow when moving delete markers
Date Tue, 10 Nov 2015 17:54:11 GMT
Lars Hofhansl created HBASE-14791:

             Summary: [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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