Thank you, iperf reports much happier numbers:
12:13:07-root@goliath:/mnt/photos $ iperf -c screamer ------------------------------------------------------------ Client connecting to screamer, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.0.3 port 57211 connected with 10.0.0.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.10 GBytes 942 Mbits/sec Strangely, I've since tried using NFS to copy files between the machines andover NFS I am getting GigE speeds.
It sounds like my netcat test might not have been valid. I'm still seeing poor Samba performance so I'll keep looking into it but that is probably more likely the drives on the receiving end given the NFS performance. Thanks, Jeff * Stolen <sto...@thecave.net> [2012-03-29 09:12:41 -0600]:
Try using iperf to test *just* the network. http://sourceforge.net/projects/iperf/?_test=b On 12-03-29 08:50 AM, Jeff Clement wrote:I don't think that's the problem though. I can get > GigE read speeds from my array. 08:46:27-root@goliath:/etc/service/dropbox-jsc $ hdparm -t /dev/lvm-raid1/photos /dev/lvm-raid1/photos: Timing buffered disk reads: 512 MB in 3.00 seconds = 170.49 MB/sec Write speeds are obviously slower but decent. 08:47:48-root@goliath:/mnt/photos $ dd if=/dev/zero of=test bs=8k count=100000 100000+0 records in 100000+0 records out 819200000 bytes (819 MB) copied, 10.3039 s, 79.5 MB/sSo I would expect that I should be able to saturate GigE on the reads and do~80 MB/s on the writes. However what I'm seeing whether I'm doing IO to disk or just piping from /dev/zero to /dev/null is around 40MB/s. It looks like my bottleneck is actually the network. The netcat test should eliminate disk IO and also eliminate the PCI-X bus as the bottle neck. I think... Jeff * Andrew J. Kopciuch <akopci...@bddf.ca> [2012-03-29 08:18:14 -0600]:Anyone have any ideas what I should be looking at in more detail. Thanks, JeffYou are probably limited by the i/o speeds of the hard drives. Your LAN can sustain around 125MB/s, but your hard drives will not be able to read / writethat fast, you will be bound to their maximums. HTH Andy_______________________________________________ clug-talk mailing list clug-talk@clug.ca http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying_______________________________________________ clug-talk mailing list clug-talk@clug.ca http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
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