[HBASE-5517] Region Server Coprocessor : Suggestion for change when next() call with nbRows>1

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.92.0
• Component/s: Coprocessors
• Assignee: Unassigned
• Reporter: Anoop Sam John
• Created: 04/Mar/12 06:13
• Updated: 13/Jun/22 15:35
• Resolved: 26/Mar/12 10:58

Description

Originated from the discussion under HBASE-2038 [Coprocessor based IHBase]

Currently preNext() and postNext() will be called once for a next() call into HRegionServer.
But if the next() is being called with nbRows>1, co processor should provide a chance to do some operation before, after every next() calls into region as part of call next(int scannerId, int nbRows).

In case of usage of coprocessor with IHBase, before making any calls of next() into a Region, we need to make a reseek() to a row based on the index information.

Issue Links

• is required by: HBASE-2038 Coprocessors: Region level indexing