[HBASE-10016] Make use of backward seek implemented in reverse scan support for range queries.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Incomplete
• Assignee: Unassigned
• Reporter: rajeshbabu
• Created: 21/Nov/13 12:39
• Updated: 17/Jun/22 04:46
• Resolved: 11/Jun/22 23:58

Description

We can use backward seek in case of range queries based on value.
Example:
Lets suppose main table data as below
row1 : c
row2 : b
row3 : d

Then in index table value will be part of rowkey.
b: row2
c :row1
d: row3

In this case first seek point we get from index table is row2 and next is row1.
When the current seek point is less than previous seek point then we can use backward seek which will be supported in HBASE-4811(Support reverse Scan) which gives better performance than closing and reseek to the lesser rowkey.

Issue Links

• is related to: HBASE-4811 Support reverse Scan