[HBASE-2127] randomWrite mode of PerformanceEvaluation benchmark program writes only to a small range of keys

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.20.2
• Fix Version/s: 0.20.3, 0.90.0
• Component/s: test

Environment

not relevant

• Hadoop Flags: Reviewed
• Assignee: Unassigned
• Reporter: Kannan Muthukkaruppan
• Created: 15/Jan/10 00:41
• Updated: 12/Oct/12 06:14
• Resolved: 15/Jan/10 01:03

Description

"randomWrite" mode of PerformanceEvaluation (PE), with nclients > 1, does random writes only within a small range rather than across all rows.

e.g, for:

./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --rows=1000 randomWrite 10

[Note: As per convention in all modes of PE, --rows is the number of rows per client]

So for the above, with # of clients set to 10, currently all clients generate writes to keys in the 0..999 range instead of the 0..9999 range.

[Fix appears to be simple. Will provide a patch.]