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08-04-2009 10:12 AM
08-04-2009 10:12 AM
GFS2 filesystem Performance with Rsync
I am trying to rsync to a gfs2 filesystem and receieving very poor performance in return. I have a 2 node RHEL5.3 cluster where node1 has write access and node2 is read-only.
On node1 there is an ext2 filesystem, an ext3 filesystem and the clustered gfs2 filesystem all with identical 37GB of data and I am testing to see how long it takes rsync to mirror the data locally when there are no changes.
The mirror from ext2 to ext3 and vice versa takes 40 seconds or less. When trying to mirror from ext2 to GFS2 it takes an hour or more.
With the mirror from ext2 to ext3 the cpu spikes to 100% and stays there for the 40 second duration. For ext2 to GFS2 the CPU for the rsync process is at 3% while the wait percentage is at 50% and the load is greater than 2. What is causing this slow performance? When I did the initial sync of the data when the GFS2 filesystem was empty I did not see slow performance in fact I thought it was sync'ing very fast and my performance issues were no more.
Can anyone help me tune the GFS2 filesystem to increase the I/O throughput of the rysnc process?
On node1 there is an ext2 filesystem, an ext3 filesystem and the clustered gfs2 filesystem all with identical 37GB of data and I am testing to see how long it takes rsync to mirror the data locally when there are no changes.
The mirror from ext2 to ext3 and vice versa takes 40 seconds or less. When trying to mirror from ext2 to GFS2 it takes an hour or more.
With the mirror from ext2 to ext3 the cpu spikes to 100% and stays there for the 40 second duration. For ext2 to GFS2 the CPU for the rsync process is at 3% while the wait percentage is at 50% and the load is greater than 2. What is causing this slow performance? When I did the initial sync of the data when the GFS2 filesystem was empty I did not see slow performance in fact I thought it was sync'ing very fast and my performance issues were no more.
Can anyone help me tune the GFS2 filesystem to increase the I/O throughput of the rysnc process?
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08-04-2009 11:31 AM
08-04-2009 11:31 AM
Re: GFS2 filesystem Performance with Rsync
I withdraw my post their is no issue with my GFS2 filesystem speed.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
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