hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-854) Datanode should scan devices in parallel to generate block report
Date Sun, 27 Dec 2009 07:15:29 GMT
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
            Reporter: dhruba borthakur


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.


Mime
View raw message