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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12010) Inter-operable between Java RS erasure coder and native RS erasure coder
Date Thu, 21 May 2015 00:42:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12010?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kai Zheng updated HADOOP-12010:
-------------------------------
    Description: It's natural and desired to support inter-operable between the two implemented
RS raw erasure coders, in other words, data encoded in one coder (like {{RSRawEncoder}}) can
be decoded using the other coder (like {{NativeRSRawDecoder}}). Without this, raw erasure
coder will not be transparent to HDFS data. As such support isn't trivial and involves challenge
work because the two implementations use different encode/decode matrix generation algorithms,
better to have this separately.  (was: It's natural and desired to support inter-operable
between the two implemented RS raw erasure coders, in other words, data encoded in one coder
(like {{RSRawEncoder}} can be decoded using the other coder (like {{NativeRSRawDecoder}}.
Without this, raw erasure coder will not be transparent to HDFS data. As such support isn't
trivial and involves challenge work because the two implementations use different encode/decode
matrix generation algorithms, better to have this separately.)

> Inter-operable between Java RS erasure coder and native RS erasure coder
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-12010
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12010
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>
> It's natural and desired to support inter-operable between the two implemented RS raw
erasure coders, in other words, data encoded in one coder (like {{RSRawEncoder}}) can be decoded
using the other coder (like {{NativeRSRawDecoder}}). Without this, raw erasure coder will
not be transparent to HDFS data. As such support isn't trivial and involves challenge work
because the two implementations use different encode/decode matrix generation algorithms,
better to have this separately.



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