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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8541) implement flush-into-stripes in stripe compactions
Date Wed, 06 Nov 2013 20:10:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13815232#comment-13815232
] 

Hudson commented on HBASE-8541:
-------------------------------

SUCCESS: Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #828 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/828/])
HBASE-8541 implement flush-into-stripes in stripe compactions (sershe: rev 1539211)
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DefaultStoreFileManager.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DefaultStoreFlusher.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileManager.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StripeMultiFileWriter.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StripeStoreConfig.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StripeStoreEngine.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StripeStoreFileManager.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StripeStoreFlusher.java
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/StripeCompactionPolicy.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStripeCompactor.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStripeStoreFileManager.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestStripeCompactionPolicy.java


> implement flush-into-stripes in stripe compactions
> --------------------------------------------------
>
>                 Key: HBASE-8541
>                 URL: https://issues.apache.org/jira/browse/HBASE-8541
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HBASE-8541-latest-with-dependencies.patch, HBASE-8541-latest-with-dependencies.patch,
HBASE-8541-latest-with-dependencies.patch, HBASE-8541-latest-with-dependencies.patch, HBASE-8541-v0.patch,
HBASE-8541-v1.patch, HBASE-8541-v2.patch, HBASE-8541-v3.patch, HBASE-8541-v4.patch, HBASE-8541-v5.patch
>
>
> Flush will be able to flush into multiple files under this design, avoiding L0 I/O amplification.
> I have the patch which is missing just one feature - support for concurrent flushes and
stripe changes. This can be done via extensive try-locking of stripe changes and flushes,
or advisory flags without blocking flushes, dumping conflicting flushes into L0 in case of
(very rare) collisions. For file loading for the latter, a set-cover-like problem needs to
be solved to determine optimal stripes. That will also address Jimmy's concern of getting
rid of metadata, btw. However currently I don't have time for that. I plan to attach the try-locking
patch first, but this won't happen for a couple weeks probably and should not block main reviews.
Hopefully this will be added on top of main reviews.



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