Thomas Graichen <thomas.graichen@xxxxxxxxxxxxxx> wrote:
> Robin Humble <rjh@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>> However, (and I guess you knew this was coming :-) I tried writing to
>> an XFS partition over NFS again - this time using work machines
>> instead of home, and the performance was a still a bit of a worry
>> to say the least.
>> ...
>> machine/config this time:
>> dual celeron 500, ASUS bp6, 512M ram, 4x maxtor 60G/7200rpm drives,
>> 2x promise ultra100 controller cards (each drive on its own controller),
>> RH7.1beta, 2.4.2-XFSsmp-3mar2001 kernel. The network is 100Mbit
>> ethernet (3c905 I think). Reiserfs was not timed as it was unable to
>> make >2G files(!!)
>> time dd if=/dev/zero of=bigFile bs=1024k count=2500
>> writes to local disk writes over nfs notes
>> xfs 16 MB/s 0.7 MB/s load ~90-100% per cpu + (*)
>> xfs over RAID0 37 MB/s 1 MB/s ""
>> xfs over RAID5 didn't try yet
>> ext2 17 MB/s 8 MB/s load ~30-40% per cpu
>> ext2 over RAID0 38 MB/s 8 MB/s ""
>> ext2 over RAID5 14 MB/s 6 MB/s "" + (**)
> i just did a very simple test on the setup i can us right now from
> remote and end up at about 2mb/sec (server: up 333mhz pII, 128mb,
> 6gb udma2 disk - so - no big hardware, ah - i forgot: k6-2/400, 64mb
> solaris8 ix86 client) - looks like something is definitely not ok
> with your setup (otherwise i would not get better results with my
> much slower hardware) - so - some things to try:
another datapoint (same setup as above):
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
128 4864 33.6 4501 13.0 3484 17.2 4701 28.8 5554 14.4 109.4 7.2
this is bonnie over nfs - looks quite ok to me for that hardware - also
the nfsd on the server only eats up about 5% cpu while doing this - so
it really looks like something on your setup is not ok
t
--
thomas.graichen@xxxxxxxxxxxxxx
innominate AG
the linux architects
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