You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Anoop Sam John (Jira)" <ji...@apache.org> on 2020/08/03 05:39:00 UTC
[jira] [Assigned] (HBASE-21721) reduce write#syncs() times
[ https://issues.apache.org/jira/browse/HBASE-21721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anoop Sam John reassigned HBASE-21721:
--------------------------------------
Assignee: Bo Cui
> reduce write#syncs() times
> --------------------------
>
> Key: HBASE-21721
> URL: https://issues.apache.org/jira/browse/HBASE-21721
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 1.3.1, 2.1.1, master, 2.2.3
> Reporter: Bo Cui
> Assignee: Bo Cui
> Priority: Major
>
> the number of write#syncs can be reduced by updating the highestUnsyncedSequence:
> before write#sync(), get the current highestUnsyncedSequence
> after write#sync, highestSyncedSequence=highestUnsyncedSequence
>
> {code:title=FSHLog.java|borderStyle=solid}
> // Some comments here
> public void run()
> {
> long currentSequence;
> while (!isInterrupted()) {
> int syncCount = 0;
> try {
> while (true) {
> ...
> try {
> Trace.addTimelineAnnotation("syncing writer");
> long unSyncedFlushSeq = highestUnsyncedSequence;
> writer.sync();
> Trace.addTimelineAnnotation("writer synced");
> if( unSyncedFlushSeq > currentSequence ) currentSequence = unSyncedFlushSeq;
> currentSequence = updateHighestSyncedSequence(currentSequence);
> } catch (IOException e) {
> LOG.error("Error syncing, request close of WAL", e);
> lastException = e;
> } catch (Exception e) {
> ...
> }
> }
> {code}
> Add code
> long unSyncedFlushSeq = highestUnsyncedSequence;
> if( unSyncedFlushSeq > currentSequence ) currentSequence = unSyncedFlushSeq;
--
This message was sent by Atlassian Jira
(v8.3.4#803005)