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https://issues.apache.org/jira/browse/HBASE-7495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13566736#comment-13566736
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Sergey Shelukhin commented on HBASE-7495:
-----------------------------------------
{code}
+ static final boolean parallelSeek = HBaseConfiguration.create().
+ getBoolean(HConstants.STORESCANNER_SEEK_PARALLEL_ENABLED, false);
{code}
The config object should be passed from outside... Creating it is unnecessary
(and can cause inconsistency)
{code}
LOG.error("");
{code}
Exception should at least be logged.
> 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
>
>
> 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：）
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