hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12719) Add test WAL provider to quantify FSHLog overhead in the absence of HDFS.
Date Wed, 31 Dec 2014 22:44:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Busbey updated HBASE-12719:
--------------------------------
      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

> Add test WAL provider to quantify FSHLog overhead in the absence of HDFS.
> -------------------------------------------------------------------------
>
>                 Key: HBASE-12719
>                 URL: https://issues.apache.org/jira/browse/HBASE-12719
>             Project: HBase
>          Issue Type: Improvement
>          Components: test, wal
>            Reporter: Sean Busbey
>            Assignee: Sean Busbey
>            Priority: Minor
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-12719.1.patch.txt, HBASE-12719.2.patch.txt, HBASE-12719_comparison_chart.tiff
>
>
> Discussion in HBASE-5699 included showing the max throughput for our WAL benchmark (using
the DisabledWALProvider) compared to when we are actually dealing with synchronization and
talking with HDFS.
> What we can't see in that comparison is how much of the (sizable) gap is due to the coordination
done in FSHLog to deal with multi-threading and how much of it is due to talking to HDFS.
> Make a test-only provider that we can use to isolate the cost for HDFS appends, HDFS
flush, and file rolling.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message