[GitHub] alerman opened a new issue #517: Tiered Storage Volume Chooser

[GitBox <gi...@apache.org>]

alerman opened a new issue #517: Tiered Storage Volume Chooser
URL: https://github.com/apache/accumulo/issues/517
 
 
   For systems with a mixture of high density, slower disks and low density faster disks provide a volume chooser that can be configured to put data accesses more often onto the faster disks. This will require having the fast/slow disks partitioned into seperate volumes, and will also require that the _majorCompact code be modified to use the volume chooser to determiner where to put new files, instead of relying on srv:dir. This choice will be made based on the tablet that is being compacted using a user defined strategy for how to decide which volume to use.
   
   Needed:
   
   1. New TieredStorageVolumeChooser
   2. New configuration options for the volume chooser
   3. Updates to major compaction code that determines the output file location (Specifcally around line 1945 of Tablet.java)
   4. A VolumeChooserStrategy that can be user defined to allow users to define how to pick the new volumes
   

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