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Posted to notifications@accumulo.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2013/02/14 21:33:13 UTC
[jira] [Commented] (ACCUMULO-919) delay file garbage collection to
survive name node failure
[ https://issues.apache.org/jira/browse/ACCUMULO-919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13578645#comment-13578645 ]
Hudson commented on ACCUMULO-919:
---------------------------------
Integrated in Accumulo-Trunk-Hadoop-2.0 #93 (See [https://builds.apache.org/job/Accumulo-Trunk-Hadoop-2.0/93/])
ACCUMULO-919 use the trash to cleanup root tablet files, recovery files, and WAL (Revision 1446314)
Result = UNSTABLE
ecn :
Files :
* /accumulo/trunk/server/src/main/java/org/apache/accumulo/server/gc/GarbageCollectWriteAheadLogs.java
* /accumulo/trunk/server/src/main/java/org/apache/accumulo/server/gc/SimpleGarbageCollector.java
* /accumulo/trunk/server/src/main/java/org/apache/accumulo/server/tabletserver/Tablet.java
* /accumulo/trunk/server/src/main/java/org/apache/accumulo/server/tabletserver/TabletServer.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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