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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12853) Change WASB documentation regarding page blob support
Date Tue, 01 Mar 2016 21:31:18 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HADOOP-12853:
-----------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 2.8.0
           Status: Resolved  (was: Patch Available)

+1 for the patch.  I have committed this to trunk, branch-2 and branch-2.8.  [~madhuch-ms],
thank you for improving the documentation.

> Change WASB documentation regarding page blob support
> -----------------------------------------------------
>
>                 Key: HADOOP-12853
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12853
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/azure
>            Reporter: madhumita chakraborty
>            Assignee: madhumita chakraborty
>            Priority: Minor
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-12853.001.patch
>
>
> WASB page blob support documentation in Features list at the top:
> Supports both page blobs (suitable for most use cases, such as MapReduce) and block blobs
(suitable for continuous write use cases, such as an HBase write-ahead log).
> Which is actually the opposite. Block blobs are better for typical big data use cases,
and page blobs were implemented to support the HBase WAL.
> It is also mentioned that
> "Page blobs can be used for other purposes beyond just HBase log files though."
> This is not strong enough because page blob has been tested only in context of HBase
write ahead logs. They have not been broadly certified for use across the Hadoop ecosystem,
hence is not recommended for use as a general purpose file-system via Hadoop cluster



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