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Posted to issues@kudu.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2017/03/01 20:34:45 UTC

[jira] [Resolved] (KUDU-1835) Support compression of the WAL

     [ https://issues.apache.org/jira/browse/KUDU-1835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon resolved KUDU-1835.
-------------------------------
       Resolution: Fixed
    Fix Version/s: 1.3.0

> Support compression of the WAL
> ------------------------------
>
>                 Key: KUDU-1835
>                 URL: https://issues.apache.org/jira/browse/KUDU-1835
>             Project: Kudu
>          Issue Type: Improvement
>          Components: log, perf
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 1.3.0
>
>
> In some workloads, particularly those which get good compression rates of the underlying data (eg via dictionary coding), the WAL becomes a big bottleneck for write performance. In addition, the large size of WALs can often mean that old WALs get GCed rapidly and cause lagging replicas to get evicted after only a temporary bout of slowness. Making WALs smaller would mean that we can retain more history without the cost of disk space.



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