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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2013/10/09 21:58:43 UTC

[jira] [Created] (HBASE-9736) Alow more than one log splitter per RS

stack created HBASE-9736:
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             Summary: Alow more than one log splitter per RS
                 Key: HBASE-9736
                 URL: https://issues.apache.org/jira/browse/HBASE-9736
             Project: HBase
          Issue Type: Improvement
          Components: MTTR
            Reporter: stack
            Priority: Critical


IIRC, this is an idea that came from the lads at Xiaomi.

I have a small cluster of 6 RSs and one went down.  It had a few WALs.  I see this in logs:

2013-10-09 05:47:27,890 DEBUG org.apache.hadoop.hbase.master.SplitLogManager: total tasks = 25 unassigned = 21

WAL splitting is held up for want of slots out on the cluster to split WALs.

We need to be careful we don't overwhelm the foreground regionservers but more splitters should help get all back online faster.



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