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https://issues.apache.org/jira/browse/WHIRR-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12977263#action_12977263
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Olivier Grisel edited comment on WHIRR-189 at 1/4/11 1:17 PM:
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FYI the local drive that has the most space on the m1.small instances is not
mounted on / but on /media/ephemeral0
[ec2-u...@ip-10-203-86-244 ec2-user]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 7.9G 1.8G 6.1G 23% /
tmpfs 840M 0 840M 0% /dev/shm
/dev/xvda2 147G 6.4G 133G 5% /media/ephemeral0
Both drives have the same (read) speed though:
[ec2-u...@ip-10-203-86-244 ec2-user]$ sudo /sbin/hdparm -tT /dev/xvda1
/dev/xvda1:
Timing cached reads: 3966 MB in 2.05 seconds = 1939.33 MB/sec
Timing buffered disk reads: 372 MB in 3.02 seconds = 123.23 MB/sec
[ec2-u...@ip-10-203-86-244 ec2-user]$ sudo /sbin/hdparm -tT /dev/xvda2
/dev/xvda2:
Timing cached reads: 4442 MB in 2.00 seconds = 2222.59 MB/sec
Timing buffered disk reads: 376 MB in 3.00 seconds = 125.19 MB/sec
was (Author: ogrisel):
FYI the local drive that has the most space on the m1.small instances is
not mounted on / but on /media/ephemeral0
[ec2-u...@ip-10-203-86-244 ec2-user]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda1 7.9G 1.8G 6.1G 23% /
tmpfs 840M 0 840M 0% /dev/shm
/dev/xvda2 147G 6.4G 133G 5% /media/ephemeral0
[ec2-u...@ip-10-203-86-244 ec2-user]$ sudo /sbin/hdparm -tT /dev/xvda2
Both drives have the same (read) speed though:
/dev/xvda1:
Timing cached reads: 3966 MB in 2.05 seconds = 1939.33 MB/sec
Timing buffered disk reads: 372 MB in 3.02 seconds = 123.23 MB/sec
/dev/xvda2:
Timing cached reads: 4442 MB in 2.00 seconds = 2222.59 MB/sec
Timing buffered disk reads: 376 MB in 3.00 seconds = 125.19 MB/sec
[ec2-u...@ip-10-203-86-244 ec2-user]$ sudo /sbin/hdparm -tT /dev/xvda1
> Hadoop on EC2 should use all available local storage
> ----------------------------------------------------
>
> Key: WHIRR-189
> URL: https://issues.apache.org/jira/browse/WHIRR-189
> Project: Whirr
> Issue Type: Improvement
> Components: service/hadoop
> Reporter: Tom White
> Fix For: 0.3.0
>
>
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