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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3178) Create example preferred volumes chooser
Date Fri, 05 Dec 2014 18:04:12 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14235811#comment-14235811
] 

Christopher Tubbs commented on ACCUMULO-3178:
---------------------------------------------

Another (awesome, I think) use case for this preferred volumes chooser was brought to my attention
today:

Imagine you have two HDFS clusters, A and B, and you want to bulk import files from A into
Accumulo running on B. Right now, bulk import has the restriction that you cannot import from
a nameservice that is not configured as an Accumulo volume. So, you typically have to run
distcp first before you can bulk import. If you list both A and B in {{instance.volumes}},
but have a volume chooser only choose A. Now, you can bulk import files currently on B, but
they'll get stored on A when they are compacted, eliminating the need to distcp.

> Create example preferred volumes chooser
> ----------------------------------------
>
>                 Key: ACCUMULO-3178
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3178
>             Project: Accumulo
>          Issue Type: Sub-task
>            Reporter: Jenna Huston
>            Assignee: Jenna Huston
>
> This example VolumeChooser chooses a volume from a user specified list of preferred volumes
for that specific table.



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