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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-6578) Make HDFS block size configurable for HBase WAL
Date Thu, 25 Jun 2015 22:17:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-6578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Nick Dimiduk resolved HBASE-6578.
    Resolution: Not A Problem

Looks like this was added in HBASE-10156 via the configuration {{hbase.regionserver.hlog.blocksize}}.

> Make HDFS block size configurable for HBase WAL
> -----------------------------------------------
>                 Key: HBASE-6578
>                 URL: https://issues.apache.org/jira/browse/HBASE-6578
>             Project: HBase
>          Issue Type: Improvement
>          Components: Performance, regionserver
>            Reporter: Karthik Ranganathan
> Right now, because sync-on-block-close is enabled, HLog causes the disk to stall out
on large writes (esp when we cross block boundary).
> We currently use 256MB blocks. The idea is that if we use smaller block sizes, we should
be able to spray the data across more disks (because of round robin scheduling) and this would
cause more uniform disk usage.

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