hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1447) Make getGenerationStampFromFile() more efficient, so it doesn't reprocess full directory listing for every block
Date Sun, 01 Mar 2015 07:00:16 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer updated HDFS-1447:
-----------------------------------
    Status: Open  (was: Patch Available)

Canceling patch.

> Make getGenerationStampFromFile() more efficient, so it doesn't reprocess full directory
listing for every block
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1447
>                 URL: https://issues.apache.org/jira/browse/HDFS-1447
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: 0.20.2
>            Reporter: Matt Foley
>            Assignee: Matt Foley
>         Attachments: HDFS-1447.patch, Test_HDFS_1447_NotForCommitt.java.patch
>
>
> Make getGenerationStampFromFile() more efficient. Currently this routine is called by
addToReplicasMap() for every blockfile in the directory tree, and it walks each file's containing
directory on every call. There is a simple refactoring that should make it more efficient.
> This work item is one of four sub-tasks for HDFS-1443, Improve Datanode startup time.
> The fix will probably be folded into sibling task HDFS-1446, which is already refactoring
the method that calls getGenerationStampFromFile().



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

Mime
View raw message