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https://issues.apache.org/jira/browse/ACCUMULO-4078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christopher Tubbs updated ACCUMULO-4078:
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Fix Version/s: 1.8.0
> Exclude special volumes
> -----------------------
>
> Key: ACCUMULO-4078
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4078
> Project: Accumulo
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.7.0
> Reporter: Matt Peterson
> Priority: Minor
> Labels: newbie
> Fix For: 1.8.0
>
>
> A few improvements to the VolumeChooser are desired for a use case that seems
> general enough to warrant an update to Accumulo.
> Use Case:
> A new volume is added, with limited capacity, to be dedicated for a specific
> table. All other tables or files should be excluded from this new volume.
> Suggested Improvements:
> 1. Update the signature for VolumeManager.choose to take a
> VolumeChooserEnvironment instead of Optional<String>. This will allow future
> parameters for volume selection without repeatedly changing the VolumeManager
> interface.
> 2. It's not currently possible to specify preferred volumes for the
> write-ahead logs
> 3. In several places including PreferredVolumeChooser, PerTableVolumeChooser
> and VolumeManagerImpl, the failsafe chooser is the RandomVolumeChooser which
> will include the instance volume that needs to be excluded. It would be
> useful to have a configurable failsafe in this situation.
> 4. The volume chooser is called in FileUtils for temp directory creation but
> it could instead use the sticky dir to create the temp directory, not needing
> the volume chooser at all.
> The above suggestions could become sub-tickets. Note that the improvements
> listed have been implemented for my particular instance and I hope to submit
> them as a patch.
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