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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7672) Erasure Coding: consolidate streamer coordination logic and handle write failure when writing striped blocks
Date Tue, 05 May 2015 23:30:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhe Zhang updated HDFS-7672:
----------------------------
    Summary: Erasure Coding: consolidate streamer coordination logic and handle write failure
when writing striped blocks  (was: Erasure Coding: handle write failure for stripping coding
blocks)

> Erasure Coding: consolidate streamer coordination logic and handle write failure when
writing striped blocks
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7672
>                 URL: https://issues.apache.org/jira/browse/HDFS-7672
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>             Fix For: HDFS-7285
>
>         Attachments: h7672_20150504.patch, h7672_20150504b.patch, h7672_20150504c.patch,
h7672_20150505.patch, h7672_20150505b.patch
>
>
> In *stripping* case, for (6, 3)-Reed-Solomon, a client writes to 6 data blocks and 3
parity blocks concurrently.  We need to handle datanode or network failures when writing a
EC BlockGroup.
> We also refactor the existing code in DFSStripedOutputStream and StripedDataStreamer.



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