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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3689) Add support for variable length block
Date Thu, 12 Feb 2015 01:57:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jing Zhao updated HDFS-3689:
    Release Note: 
1. HDFS now can choose to append data to a new block instead of end of the last partial block.
Users can pass {{CreateFlag.APPEND}} and  {{CreateFlag.NEW_BLOCK}} to the {{append}} API to
indicate this requirement.
2. HDFS now allows users to pass {{SyncFlag.END_BLOCK}} to the {{hsync}} API to finish the
current block and write remaining data to a new block.

> Add support for variable length block
> -------------------------------------
>                 Key: HDFS-3689
>                 URL: https://issues.apache.org/jira/browse/HDFS-3689
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, hdfs-client, namenode
>    Affects Versions: 3.0.0
>            Reporter: Suresh Srinivas
>            Assignee: Jing Zhao
>             Fix For: 3.0.0
>         Attachments: HDFS-3689.000.patch, HDFS-3689.001.patch, HDFS-3689.002.patch, HDFS-3689.003.patch,
HDFS-3689.003.patch, HDFS-3689.004.patch, HDFS-3689.005.patch, HDFS-3689.006.patch, HDFS-3689.007.patch,
HDFS-3689.008.patch, HDFS-3689.008.patch, HDFS-3689.009.patch, HDFS-3689.009.patch, HDFS-3689.010.patch,
HDFS-3689.branch-2.patch, editsStored
> Currently HDFS supports fixed length blocks. Supporting variable length block will allow
new use cases and features to be built on top of HDFS. 

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