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Posted to hdfs-issues@hadoop.apache.org by "Ayush Saxena (JIRA)" <ji...@apache.org> on 2019/02/02 06:45:00 UTC

[jira] [Updated] (HDFS-7663) Erasure Coding: Append on striped file

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

Ayush Saxena updated HDFS-7663:
-------------------------------
    Attachment: HDFS-7663-02.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
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Jing Zhao
>            Assignee: Ayush Saxena
>            Priority: Major
>         Attachments: HDFS-7663-02.patch, 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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