[OpenAFS] CPU Load OpenAFS 1.4 fileerver

[Lars Schimmer]

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Hi!

I just grabbed some data.
I use a dell Xeon for a OpenAFS file- and databaseserver.
No else service is running on that machine, a 3-disk linux-software
RAID5 is built for /vicepa.
CPU info:
model name      : Intel(R) Xeon(TM) CPU 3.00GHz
stepping        : 1
cpu MHz         : 2992.791
cache size      : 1024 KB

Now I vos move a volume from that server to another one. the load of
this server is low, 0.2, a top says round about 6% CPU load for
volserver. Nothing special.
But if I copy a big file (CD iso) from a OpenAFS 1.4 client to this
server, the load jumps up to 5 and top tells me, the filseserver
consumes 90% of the CPU. OK, the speed of the transfer was near
linespeed (10 MB/sec) and I set encryption on. But still,
why does the fileserver consumes SO much power of the CPU?

Cya
Lars
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TU Graz, Institut f=FCr ComputerGraphik & WissensVisualisierung
Tel.: +43 316 873-5405       E-Mail: l.schimmer@cgv.tugraz.at
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