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Liang Xie commented on HBASE-7495: ---------------------------------- Hi [~yuzhih...@gmail.com], i ran the TestCoprocessorScanPolicy case, it costs 22+s in my box, if we have two cases w/ and w/o StoreScanner.STORESCANNER_PARALLEL_SEEK_ENABLE being true, it means the whole daily QA running time will add 22+s. Is it ok that add "conf.setBoolean(StoreScanner.STORESCANNER_PARALLEL_SEEK_ENABLE, true);" into setUpBeforeClass(). It'll always enable this feature in TestCoprocessorScanPolicy case, without making QA time longger ? > parallel seek in StoreScanner > ----------------------------- > > Key: HBASE-7495 > URL: https://issues.apache.org/jira/browse/HBASE-7495 > Project: HBase > Issue Type: Bug > Components: Scanners > Affects Versions: 0.94.3, 0.96.0 > Reporter: Liang Xie > Assignee: Liang Xie > Attachments: HBASE-7495.txt, HBASE-7495.txt, HBASE-7495.txt, > HBASE-7495-v2.txt, HBASE-7495-v3.txt, HBASE-7495-v4.txt, HBASE-7495-v4.txt, > HBASE-7495-v5.txt, HBASE-7495-v6.txt, HBASE-7495-v7.txt > > > seems there's a potential improvable space before doing scanner.next: > {code:title=StoreScanner.java|borderStyle=solid} > if (explicitColumnQuery && lazySeekEnabledGlobally) { > for (KeyValueScanner scanner : scanners) { > scanner.requestSeek(matcher.getStartKey(), false, true); > } > } else { > for (KeyValueScanner scanner : scanners) { > scanner.seek(matcher.getStartKey()); > } > } > {code} > we can do scanner.requestSeek or scanner.seek in parallel, instead of current > serialization, to reduce latency for special case. > Any ideas on it ? I'll have a try if the comments/suggestions are positive:) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira