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https://issues.apache.org/jira/browse/SPARK-7056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14507057#comment-14507057
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Tathagata Das commented on SPARK-7056:
--------------------------------------

Users may want the WAL data to be written to non-HDFS data storage systems. To 
allow that, we have to make the WAL pluggable. The following design doc 
outlines the plan. 

https://docs.google.com/a/databricks.com/document/d/1A2XaOLRFzvIZSi18i_luNw5Rmm9j2j4AigktXxIYxmY/edit?usp=sharing



> Make the WriteAheadLog pluggable
> --------------------------------
>
>                 Key: SPARK-7056
>                 URL: https://issues.apache.org/jira/browse/SPARK-7056
>             Project: Spark
>          Issue Type: Improvement
>          Components: Streaming
>    Affects Versions: 1.3.1
>            Reporter: Tathagata Das
>            Assignee: Tathagata Das
>            Priority: Critical
>
> This is a master JIRA that tracks a number of improvements to the WAL. 



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