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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8030) HDFS Erasure Coding Phase II -- EC with contiguous layout
Date Wed, 16 Dec 2015 01:47:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059317#comment-15059317
] 

Kai Zheng commented on HDFS-8030:
---------------------------------

Thanks [~zhz] for initiating phase II work. I guess we'll need a new branch to start the work?


> HDFS Erasure Coding Phase II -- EC with contiguous layout
> ---------------------------------------------------------
>
>                 Key: HDFS-8030
>                 URL: https://issues.apache.org/jira/browse/HDFS-8030
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: erasure-coding
>            Reporter: Zhe Zhang
>            Assignee: Zhe Zhang
>         Attachments: HDFSErasureCodingPhaseII-20151204.pdf
>
>
> Data redundancy form -- replication or erasure coding, should be orthogonal to block
layout -- contiguous or striped. This JIRA explores the combination of {{Erasure Coding}}
+ {{Contiguous}} block layout.
> As will be detailed in the design document, key benefits include preserving block locality,
and easy conversion between hot and cold modes. 



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