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Posted to common-issues@hadoop.apache.org by "Wei-Chiu Chuang (JIRA)" <ji...@apache.org> on 2017/03/02 18:41:45 UTC
[jira] [Commented] (HADOOP-13665) Erasure Coding codec should
support fallback coder
[ https://issues.apache.org/jira/browse/HADOOP-13665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15892751#comment-15892751 ]
Wei-Chiu Chuang commented on HADOOP-13665:
------------------------------------------
FYI [~lewuathe],
see the comment at https://issues.apache.org/jira/browse/HDFS-7285?focusedCommentId=15890254&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15890254
There are folks who are implementing a new EC codec. Let's make sure the patch is pluggable so that adding a new EC codec is easy.
Thanks!
> Erasure Coding codec should support fallback coder
> --------------------------------------------------
>
> Key: HADOOP-13665
> URL: https://issues.apache.org/jira/browse/HADOOP-13665
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: io
> Reporter: Wei-Chiu Chuang
> Assignee: Kai Sasaki
> Priority: Blocker
> Labels: hdfs-ec-3.0-must-do
> Attachments: HADOOP-13665.01.patch, HADOOP-13665.02.patch, HADOOP-13665.03.patch, HADOOP-13665.04.patch
>
>
> The current EC codec supports a single coder only (by default pure Java implementation). If the native coder is specified but is unavailable, it should fallback to pure Java implementation.
> One possible solution is to follow the convention of existing Hadoop native codec, such as transport encryption (see {{CryptoCodec.java}}). It supports fallback by specifying two or multiple coders as the value of property, and loads coders in order.
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