Amrik Singh wrote:
Recently we started noticing very high (70-90%) wait states on the file
servers when compute nodes. We have tried to optimize the NFS through
increasing the number of daemons and the rsize and wsize but to no avail.
PS: All the nodes are running SuSE 10.0 and servers are running SuSE10.0
and 10.1 and all the drives are formatted with reiserfs.
Hmmm... I remember Reiser has had a problem in the past when file systems get
full or nearly so.
ReiserFS still has these problems. I ran into them myself about nine
months ago when a file system got full. Hans Reiser has written that he
can produce a file system defragmenter/optimizer that would fix this.
But he was waiting for a paying customer before doing so.
Unless someone else has written a defragmenter, then this is probably
still a problem. I am moving away from ReiserFS because of this.
Cheers,
Bruce
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