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From "Walter Su (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7663) Erasure Coding: Append on striped file
Date Fri, 13 Nov 2015 03:49:11 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Walter Su updated HDFS-7663:
----------------------------
    Attachment: HDFS-7663.01.patch

> Erasure Coding: Append on striped file
> --------------------------------------
>
>                 Key: HDFS-7663
>                 URL: https://issues.apache.org/jira/browse/HDFS-7663
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Jing Zhao
>            Assignee: Walter Su
>         Attachments: HDFS-7663.00.txt, HDFS-7663.01.patch
>
>
> Append should be easy if we have variable length block support from HDFS-3689, i.e.,
the new data will be appended to a new block. We need to revisit whether and how to support
appending data to the original last block.
> 1. Append to a closed striped file, with NEW_BLOCK flag enabled (this)
> 2. Append to a under-construction striped file, with NEW_BLOCK flag enabled (HDFS-9173)
> 3. Append to a striped file, by appending to last block group (follow-on)
> This jira attempts to implement the #1, and also track #2, #3.



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