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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6508) [0.89-fb] Filter out edits at log split time
Date Thu, 06 Sep 2012 18:17:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449886#comment-13449886
] 

Hudson commented on HBASE-6508:
-------------------------------

Integrated in HBase-TRUNK #3310 (See [https://builds.apache.org/job/HBase-TRUNK/3310/])
    HBASE-6659 Port HBASE-6508 Filter out edits at log split time (Revision 1381684)

     Result = FAILURE
tedyu : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/RegionLoad.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/RequestConverter.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/ResponseConverter.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/generated/HBaseProtos.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/generated/RegionServerStatusProtos.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LastSequenceId.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SplitLogWorker.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogSplitter.java
* /hbase/trunk/hbase-server/src/main/protobuf/RegionServerStatus.proto
* /hbase/trunk/hbase-server/src/main/protobuf/hbase.proto
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestHLogFiltering.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestHLogSplit.java

                
> [0.89-fb] Filter out edits at log split time
> --------------------------------------------
>
>                 Key: HBASE-6508
>                 URL: https://issues.apache.org/jira/browse/HBASE-6508
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, regionserver, wal
>    Affects Versions: 0.89-fb
>            Reporter: Alex Feinberg
>            Assignee: Alex Feinberg
>             Fix For: 0.89-fb
>
>
> At log splitting time, we can filter out many edits if we have a conservative estimate
of what was saved last in each region.
> This patch does the following:
> 1) When a region server flushes a MemStore to HFile, store the last flushed sequence
id for the region in a map.
> 2) Send the map to master it as a part of the region server report.
> 3) Adds an RPC call in HMasterRegionInterface to allow a region server to query the last
last flushed sequence id for a region.
> 4) Skips any log entry with sequence id lower than last flushed sequence id for the region
during log split time.
> 5) When a region is removed from a region server, removed the the entry for that region
from the map, so that it isn't sent during the next report.
> This can reduce downtime when a regionserver goes down quite a bit.

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