rsync speed?

jedimastermopar · 05-06-2005, 02:20 PM

I am just wondering if there is some sort of speed cap with rsync? I am running it between two redhat 4 es machines with 2.6 kernel. and the lates rsync. both computer have gigabit nic's and are on a cisco gigabit switch. I am only transfering at about 5 - 8 MB/s I would have thought it would be faster than that? Both machines have 10,000rpm sata hard drives and have little to no load on them.

macemoneta · 05-06-2005, 05:07 PM

Are your NICs/switch capable of using jumbo frames? If so, enable them:

ifconfig eth0 mtu 9000

Check for errors on the transmission:

netstat -i

If there are errors, replace the cables. If not, remove the switch from the path with a cat5e crossover cable. If that speeds up the data transfer, go yell at Cisco.

jedimastermopar · 05-07-2005, 09:16 AM

Can you point me to any info on jumbo frames? I have never heard of that before.

macemoneta · 05-07-2005, 10:49 AM

Jumbo frames are simply Ethernet frames with an MTU greater than 1500. There are good articles here, here, and here.

jedimastermopar · 05-07-2005, 11:08 AM

Thanks.