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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-223) Maximize disk read bandwidth utilization of StorageManagerV2 by moving Tuple creation role to next()
Date Fri, 04 Oct 2013 10:01:43 GMT

    [ https://issues.apache.org/jira/browse/TAJO-223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13786041#comment-13786041
] 

Hudson commented on TAJO-223:
-----------------------------

SUCCESS: Integrated in Tajo-trunk-postcommit #494 (See [https://builds.apache.org/job/Tajo-trunk-postcommit/494/])
TAJO-223: Maximize disk read bandwidth utilization of StorageManagerV2 by moving Tuple creation
role to next() (Keuntae Park via hyunsik) (hyunsik: https://git-wip-us.apache.org/repos/asf?p=incubator-tajo.git&a=commit&h=4449d9c48e9d0cdca7fa4a523fe4f9f389404f87)
* tajo-core/tajo-core-storage/src/test/java/org/apache/tajo/storage/v2/TestStorages.java
* tajo-core/tajo-core-storage/src/test/java/org/apache/tajo/storage/v2/TestCSVScanner.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/FileScannerV2.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/ScanScheduler.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/RCFileScanner.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/ScheduledInputStream.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/client/TajoClient.java
* CHANGES.txt
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/CSVFileScanner.java
* tajo-core/tajo-core-storage/src/test/java/org/apache/tajo/storage/index/TestBSTIndex.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/RCFile.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/StorageManagerV2.java
* tajo-core/tajo-core-storage/src/test/java/org/apache/tajo/storage/v2/TestCSVCompression.java
* tajo-core/tajo-core-storage/src/main/java/org/apache/tajo/storage/v2/DiskFileScanScheduler.java


> Maximize disk read bandwidth utilization of StorageManagerV2 by moving Tuple creation
role to next()
> ----------------------------------------------------------------------------------------------------
>
>                 Key: TAJO-223
>                 URL: https://issues.apache.org/jira/browse/TAJO-223
>             Project: Tajo
>          Issue Type: Improvement
>          Components: storage
>            Reporter: Keuntae Park
>            Assignee: Keuntae Park
>              Labels: performance
>             Fix For: 0.2-incubating
>
>         Attachments: TAJO-223_2.patch, TAJO-223.patch
>
>
> Currently, Tuple creation mechanism of StorageManagerV2 is as follows:
> 1) At file scan, scheduled scanner reads data from disk, makes a Tuple, and insert it
to the Tuple pool
> 2) next() of the scanner just pulls an already created Tuple from the Tuple pool asynchronously
> Because of Tuple creation time, scanner cannot fully use its time to read disk, which
results in less disk read bandwidth utilization
> So, if Tuple creation role is moved to next() and scanners spend their whole time to
read file at file scan,
> we can fully utilize disk read bandwidth 



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