Re: [opensuse] Real-world Transfered Speed over 100tx Network

Lee Bengston wrote:

On Wed, Oct 22, 2008 at 2:23 AM, David C. Rankin wrote:

...

Listmates,

What are the real-world transfer speeds you are seeing with rsync SuSEbox-to-SuSEbox over a 100TX network? As files get larger, the backup/transfer times keep rising. I am seeing transfer rates for gigabyte size files of 11.04 MB/s over the network. A comparison to drive-to-drive transfers within the same 10.3 box are about 28 MB/s. I wouldn't expect box-to-box transfers to be the same as drive-to-drive transfers, but losing 60% seems large. That maybe normal, but I thought I would ask and see what others are seeing.

Are there any other tips or tricks to speed things up?

11 MB/s = 88 mbps "100TX" interface = 100 mbps

The 100mbps spec for a 100BaseT interface includes Ethernet overhead. The 88mbps achieved in your file transfer does not include the overhead - only the data. Therefore the actual speed of bits flowing on the line during your transfer is 88mbps + overhead, which implies that it is already at or close to the best you are going to do with a 100mbps interface. My only thought is that you would need to upgrade to a gigabit network.

Regards, Lee

Lee, Thank you 100%! I learned something new today that I hadn't bothered to think about since calculating transfer rates on a 2400 baud modem ('91 if I recall). Thanks for helping to turn the light bulb on. -- David C. Rankin, J.D., P.E. Rankin Law Firm, PLLC 510 Ochiltree Street Nacogdoches, Texas 75961 Telephone: (936) 715-9333 Facsimile: (936) 715-9339 www.rankinlawfirm.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org