hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-854) Datanode should scan devices in parallel to generate block report
Date Tue, 30 Mar 2010 01:27:29 GMT

     [ https://issues.apache.org/jira/browse/HDFS-854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jakob Homan updated HDFS-854:

    Hadoop Flags: [Reviewed]

+1. TestDataNodeScanner passes with the patch on my box - Hudson's acting up again.  Other
test failure is unrelated.  Unless there are more comments, I'll commit this this evening.

> Datanode should scan devices in parallel to generate block report
> -----------------------------------------------------------------
>                 Key: HDFS-854
>                 URL: https://issues.apache.org/jira/browse/HDFS-854
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>    Affects Versions: 0.22.0
>            Reporter: dhruba borthakur
>            Assignee: Dmytro Molkov
>             Fix For: 0.22.0
>         Attachments: HDFS-854-2.patch, HDFS-854.patch, HDFS-854.patch.1
> A Datanode should scan its disk devices in parallel so that the time to generate a block
report is reduced. This will reduce the startup time of a cluster.
> A datanode has 12 disk (each of 1 TB) to store HDFS blocks. There is a total of 150K
blocks on these 12 disks. It takes the datanode upto 20 minutes to scan these devices to generate
the first block report.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message