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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-919) delay file garbage collection to survive name node failure
Date Wed, 27 Feb 2013 22:47:14 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13588871#comment-13588871
] 

Hudson commented on ACCUMULO-919:
---------------------------------

Integrated in Accumulo-1.4.x #277 (See [https://builds.apache.org/job/Accumulo-1.4.x/277/])
    ACCUMULO-919 port the Trash updates back to 1.4 (Revision 1450909)

     Result = SUCCESS
ecn : 
Files : 
* /accumulo/branches/1.4
* /accumulo/branches/1.4/src
* /accumulo/branches/1.4/src/core
* /accumulo/branches/1.4/src/server
* /accumulo/branches/1.4/src/server/src
* /accumulo/branches/1.4/src/server/src/main/java/org/apache/accumulo/server/master/CoordinateRecoveryTask.java
* /accumulo/branches/1.4/src/server/src/main/java/org/apache/accumulo/server/tabletserver/Tablet.java
* /accumulo/branches/1.4/src/server/src/main/java/org/apache/accumulo/server/test/functional/BulkSplitOptimizationTest.java

                
> delay file garbage collection to survive name node failure
> ----------------------------------------------------------
>
>                 Key: ACCUMULO-919
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-919
>             Project: Accumulo
>          Issue Type: Bug
>          Components: gc
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Blocker
>             Fix For: 1.5.0
>
>
> Consider the catastrophic loss of the namenode.
> Assuming you have a previous snapshot, you can recover the namenode using another node
back to that snapshot.
> However, the most recently deleted files will show as corrupt, because the slightly older
state will point to blocks that are now gone.
> If the gc delayed file collection for a period of time longer than the age of a snapshot,
accumulo could be recovered with the snapshot.

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