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liang xie commented on HBASE-7495:
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How about "scanner.seek" [~lhofhansl], we seek memstore and storefiles one by one currently.
> parallel scanner seek in StoreScanner's constructor
> ---------------------------------------------------
>
> 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
>
> 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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