Steven Adams wrote:
I am using XFS for the first time of one of my servers. I was using
rsync to copy the files from the old server to the new server and
noticed that every 5-6 transfer the speeds would slow down to only
1-2MB/s and sometimes stop all together.
I suspected this was due to the cache/memory getting filled up so XFS
has to write the changes to the sata drive. I tried to turn off
write-cache and nobarriers but still have the same problem..
When i try it on the ext3 filesystem it runs at a constant transfer speed.
Is this normal with the XFS filesystem?
We looked at this a bit on irc tonight and even streaming direct IO to a
contiguous xfs file was going very very slow. I think he also tested
direct IO reads from the device, and found them slow as well, so the
problem may well be beneath xfs.