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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7056) Snapshot support for truncate
Date Tue, 24 Feb 2015 08:02:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14334562#comment-14334562
] 

Konstantin Shvachko commented on HDFS-7056:
-------------------------------------------

The patch is up for review in HDFS-7831.

> Snapshot support for truncate
> -----------------------------
>
>                 Key: HDFS-7056
>                 URL: https://issues.apache.org/jira/browse/HDFS-7056
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 3.0.0
>            Reporter: Konstantin Shvachko
>            Assignee: Plamen Jeliazkov
>             Fix For: 2.7.0
>
>         Attachments: HDFS-3107-HDFS-7056-combined-13.patch, HDFS-3107-HDFS-7056-combined-15.patch,
HDFS-3107-HDFS-7056-combined.patch, HDFS-3107-HDFS-7056-combined.patch, HDFS-3107-HDFS-7056-combined.patch,
HDFS-3107-HDFS-7056-combined.patch, HDFS-3107-HDFS-7056-combined.patch, HDFS-3107-HDFS-7056-combined.patch,
HDFS-3107-HDFS-7056-combined.patch, HDFS-3107-HDFS-7056-combined.patch, HDFS-3107-HDFS-7056-combined.patch,
HDFS-7056-13.patch, HDFS-7056-15.patch, HDFS-7056.15_branch2.patch, HDFS-7056.patch, HDFS-7056.patch,
HDFS-7056.patch, HDFS-7056.patch, HDFS-7056.patch, HDFS-7056.patch, HDFS-7056.patch, HDFS-7056.patch,
HDFSSnapshotWithTruncateDesign.docx, HDFSSnapshotWithTruncateDesign.docx, editsStored, editsStored.xml
>
>
> Implementation of truncate in HDFS-3107 does not allow truncating files which are in
a snapshot. It is desirable to be able to truncate and still keep the old file state of the
file in the snapshot.



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