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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-833) Storage access layer
Date Tue, 11 Aug 2009 21:54:14 GMT

     [ https://issues.apache.org/jira/browse/PIG-833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alan Gates updated PIG-833:
---------------------------

    Attachment: TEST-org.apache.hadoop.zebra.pig.TestCheckin1.txt

Okay, now that I've first built Pig's test, I run the tests and I get:

{code}
 [delete] Deleting directory /Users/gates/src/pig/apache/top/zebra/trunk/build/contrib/zebra/test/logs
    [mkdir] Created dir: /Users/gates/src/pig/apache/top/zebra/trunk/build/contrib/zebra/test/logs
    [junit] Running org.apache.hadoop.zebra.io.TestCheckin
    [junit] Tests run: 125, Failures: 0, Errors: 0, Time elapsed: 16.894 sec
    [junit] Running org.apache.hadoop.zebra.mapred.TestCheckin
    [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 158.741 sec
    [junit] Running org.apache.hadoop.zebra.pig.TestCheckin1
    [junit] Tests run: 0, Failures: 0, Errors: 2, Time elapsed: 0.13 sec
    [junit] Test org.apache.hadoop.zebra.pig.TestCheckin1 FAILED
    [junit] Running org.apache.hadoop.zebra.pig.TestCheckin2
    [junit] Tests run: 0, Failures: 0, Errors: 2, Time elapsed: 0.131 sec
    [junit] Test org.apache.hadoop.zebra.pig.TestCheckin2 FAILED
    [junit] Running org.apache.hadoop.zebra.pig.TestCheckin3
    [junit] Tests run: 0, Failures: 0, Errors: 2, Time elapsed: 0.133 sec
    [junit] Test org.apache.hadoop.zebra.pig.TestCheckin3 FAILED
    [junit] Running org.apache.hadoop.zebra.pig.TestCheckin4
    [junit] Tests run: 0, Failures: 0, Errors: 2, Time elapsed: 0.128 sec
    [junit] Test org.apache.hadoop.zebra.pig.TestCheckin4 FAILED
    [junit] Running org.apache.hadoop.zebra.pig.TestCheckin5
    [junit] Tests run: 0, Failures: 0, Errors: 2, Time elapsed: 0.128 sec
    [junit] Test org.apache.hadoop.zebra.pig.TestCheckin5 FAILED
    [junit] Running org.apache.hadoop.zebra.types.TestCheckin
    [junit] Tests run: 45, Failures: 0, Errors: 0, Time elapsed: 0.253 sec
{code}

I've attached the output from one of the tests.

> Storage access layer
> --------------------
>
>                 Key: PIG-833
>                 URL: https://issues.apache.org/jira/browse/PIG-833
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Jay Tang
>         Attachments: hadoop20.jar.bz2, PIG-833-zebra.patch, PIG-833-zebra.patch.bz2,
PIG-833-zebra.patch.bz2, TEST-org.apache.hadoop.zebra.pig.TestCheckin1.txt, test.out, zebra-javadoc.tgz
>
>
> A layer is needed to provide a high level data access abstraction and a tabular view
of data in Hadoop, and could free Pig users from implementing their own data storage/retrieval
code.  This layer should also include a columnar storage format in order to provide fast data
projection, CPU/space-efficient data serialization, and a schema language to manage physical
storage metadata.  Eventually it could also support predicate pushdown for further performance
improvement.  Initially, this layer could be a contrib project in Pig and become a hadoop
subproject later on.

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