[ACCUMULO-2883] Add API method(s) that support fetching currently assigned locations for tablets

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.8.0
• Component/s: client
• Assignee: Keith Turner Assign to me
• Reporter: Josh Elser
• Created: 10/Jun/14 15:18
• Updated: 03/Jun/16 18:11
• Resolved: 08/Dec/15 20:49

Description

TabletLocator already exists, but isn't officially a part of the "public API" and is clunky for users to invoke. In trying to co-locate external processes with the tabletservers that are hosting some data, it would be nice to have some means that users can invoke that will return them these assignments.

Memory concerns are an issue for tables with many splits (e.g. avoiding creating a Set of 100k tablet locations for a table), but we also want to provide the ability to ask pointed questions. Likely building something that accepts a Range (or Collection<Range>) would be best.

Issue Links

• is depended upon by: GORA-451 Upgrade to Accumulo 1.8.0
• is related to: ACCUMULO-3602 BatchScanner optimization for AccumuloInputFormat
• links to: GitHub Pull Request #53