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Posted to common-dev@hadoop.apache.org by "Chris Douglas (JIRA)" <ji...@apache.org> on 2008/10/16 03:52:44 UTC

[jira] Updated: (HADOOP-4425) Edits log takes much longer to load

     [ https://issues.apache.org/jira/browse/HADOOP-4425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Douglas updated HADOOP-4425:
----------------------------------

    Attachment: 4425-0.patch

FSEditLog.EditLogFileInputStream doesn't overload the read(byte[]) methods in InputStream, which is causing performance to degrade. The patch restores and improves edit log load times.

> Edits log takes much longer to load
> -----------------------------------
>
>                 Key: HADOOP-4425
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4425
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.19.0
>            Reporter: Chris Douglas
>            Priority: Blocker
>             Fix For: 0.19.0
>
>         Attachments: 4425-0.patch
>
>
> The edits log takes significantly longer (+52% to +377% in tests simulating 200k to 20M files) to load in 0.19 than it did in 0.18.

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