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https://issues.apache.org/jira/browse/HBASE-4071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13086808#comment-13086808
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jirapos...@reviews.apache.org commented on HBASE-4071:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/1582/
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(Updated 2011-08-18 05:07:35.742598)
Review request for Ian Varley.
Summary
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A min versions coupled with TTL.
Note that the I unified the GC logic inside the ColumnTrackers. Previously they
did the versioning and TTL was handled outside.
What is still open what to do with Store.getKeyAtOrBefore(...)
Diffs
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http://svn.apache.org/repos/asf/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestMinVersions.java
PRE-CREATION
http://svn.apache.org/repos/asf/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanWildcardColumnTracker.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ScanWildcardColumnTracker.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/ruby/hbase/admin.rb
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/TestExplicitColumnTracker.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ColumnTracker.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ExplicitColumnTracker.java
1158860
http://svn.apache.org/repos/asf/hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java
1158860
Diff: https://reviews.apache.org/r/1582/diff
Testing
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See TestMinVersions.
Thanks,
Lars
> Data GC: Remove all versions > TTL EXCEPT the last written version
> ------------------------------------------------------------------
>
> Key: HBASE-4071
> URL: https://issues.apache.org/jira/browse/HBASE-4071
> Project: HBase
> Issue Type: New Feature
> Reporter: stack
> Attachments: MinVersions.diff
>
>
> We were chatting today about our backup cluster. What we want is to be able
> to restore the dataset from any point of time but only within a limited
> timeframe -- say one week. Thereafter, if the versions are older than one
> week, rather than as we do with TTL where we let go of all versions older
> than TTL, instead, let go of all versions EXCEPT the last one written. So,
> its like versions==1 when TTL > one week. We want to allow that if an error
> is caught within a week of its happening -- user mistakenly removes a
> critical table -- then we'll be able to restore up the the moment just before
> catastrophe hit otherwise, we keep one version only.
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