Linux Client -> Solaris Server

[Marc Schmitt <mschmitt@inf.ethz.ch>]

Hi all,

I'm looking for hints on how to improve the performance of Linux clients 
(RHEL 3.0, 2.4.21-15.EL, 100Mb NIC) talking to a Solaris server (ES250, 
SunOS 5.9 Generic_112233-11 sun4u sparc, 100Mb NIC). What I currently 
get from my testing (dd if=/dev/zero of=zero.txt bs=2048 count=1000000) 
is between 2 and 2.5 MB/s. I upped the rsize/wsize to 32768 (according 
to http://nfs.sourceforge.net/nfs-howto/interop.html#SOLARIS) which did 
not help, the result was actually worse than not specifying any mount 
options at all. Running the dd test locally on the Sun returns a 
throughput of 14MB/s (SW RAID 5 on A1000). Iperf gives a decent 85Mb/s 
throughput between the server and a client, I think it's safe to say 
that the network layer is ok. I did the test using -o 
tcp,nfsvers=3,rsize=32768,wsize=32768, too, it made no difference at all.

I hope to at least double the performance I currently measure. Does that 
mean I have to get rid of the Sun...?

Any pointers are welcome, thanks.

Greetings,
	Marc





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