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Date: Tue, 15 Dec 2009 22:55:18 +0000 (UTC)
From: "Jean-Daniel Cryans (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Updated: (HBASE-2041) Change WAL default configuration
 values
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     [ https://issues.apache.org/jira/browse/HBASE-2041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jean-Daniel Cryans updated HBASE-2041:
--------------------------------------

    Attachment: HBASE-2041-interrupt-fix.patch

Lots of debugging later, I learned that not using awaitNanos on Condition, with a small waiting time and multiple threads, can actually completely hide interrupts. This patches changes that, checks the status of the Thread and also changes some comments.

BTW even when calling this.isInterrupted() with the await(1000, MILLIS) didn't work, always returned false.

> Change WAL default configuration values
> ---------------------------------------
>
>                 Key: HBASE-2041
>                 URL: https://issues.apache.org/jira/browse/HBASE-2041
>             Project: Hadoop HBase
>          Issue Type: Task
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.21.0
>
>         Attachments: HBASE-2041-interrupt-fix.patch, HBASE-2041.patch
>
>
> My last email on the thread "Should we change the default value of hbase.regionserver.flushlogentries for 0.21?"
> {quote}
> Ok to make sure I get this right:
> - we enable deferred log flush by default
> - we set flushlogentries=1
> Also since 10 seconds is kind of a huge window I propose that:
> - we set optionalLogFlush=1000
> which is the MySQL default. We also have to update the wiki (there's
> already an entry on deferred log flush) by adding the configuration of
> flushlogentries.
> {quote}

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