accumulo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Matt Peterson (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-4078) Exclude special volumes
Date Sat, 19 Dec 2015 14:17:46 GMT


Matt Peterson commented on ACCUMULO-4078:

I don't seem to have the rights to assign this to myself, but feel free to assign me.  Thanks!

> Exclude special volumes
> -----------------------
>                 Key: ACCUMULO-4078
>                 URL:
>             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
> 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.

This message was sent by Atlassian JIRA

View raw message