Re: Bad performance while transfer large block size through NFS.

I set up one NFS server, and mounted on other server by TCP. Servers
connected with Giga network, and running 6.2-RELEASE.

But I found the performance is very bad while transfering large block
size data.

I dont know if it makes any sense, but at least the following experiment might
be fun:

1. With various block sizes (e. g. 32k, 128k, 1m, 2m) on the client box:
dd if=/dev/zero of=/dev/null bs=XXX count=1k

2. With various block sizes (e. g. 32k, 128k, 1m, 2m) on the client box:
dd if=/dev/zero bs=XXX count=1k | dd of=/path/to/nfs/mount bs=32k

3. With various block sizes (e. g. 32k, 128k, 1m, 2m) on the client box:
dd if=/dev/zero bs=XXX count=1k | dd of=/dev/null bs=32k

The idea would be, that possibly the client box has problems, when it has to
handle big data blocks inside the kernel (in that case part 1 would show the
same performance degradation as ur initial test).

-Arne




____________________________________________________________________________________
The fish are biting.
Get more visitors on your site using Yahoo! Search Marketing.
http://searchmarketing.yahoo.com/arp/sponsoredsearch_v2.php
_______________________________________________
freebsd-performance@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-performance
To unsubscribe, send any mail to "freebsd-performance-unsubscribe@xxxxxxxxxxx"

Relevant Pages