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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12635) Adding Append API support for WASB
Date Mon, 18 Jan 2016 18:32:40 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HADOOP-12635:
-----------------------------------
    Release Note: The Azure Blob Storage file system (WASB) now includes optional support
for use of the append API by a single writer on a path.  Please note that the implementation
differs from the semantics of HDFS append.  HDFS append internally guarantees that only a
single writer may append to a path at a given time.  WASB does not enforce this guarantee
internally.  Instead, the application must enforce access by a single writer, such as by running
single-threaded or relying on some external locking mechanism to coordinate concurrent processes.

> Adding Append API support for WASB
> ----------------------------------
>
>                 Key: HADOOP-12635
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12635
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: azure
>    Affects Versions: 2.7.1
>            Reporter: Dushyanth
>            Assignee: Dushyanth
>             Fix For: 2.8.0
>
>         Attachments: Append API.docx, HADOOP-12635-004.patch, HADOOP-12635.001.patch,
HADOOP-12635.002.patch, HADOOP-12635.003.patch, HADOOP-12635.005.patch, HADOOP-12635.006.patch,
HADOOP-12635.007.patch
>
>
> Currently the WASB implementation of the HDFS interface does not support Append API.
This JIRA is added to design and implement the Append API support to WASB. The intended support
for Append would only support a single writer.  



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