On Wed, Jun 21, 2006 at 05:06:22PM +1000, Christian Hack wrote: > > > > I just installed Cygwin / OpenSSH / rsync on two Dell PowerVault 745N > > NASes running Windows 2003 Appliance Edition. My rsync daemons are > > running, ssh works, and in theory all is well. But... I'm getting an > > average of maybe 15 Mb/s rsyncing between them. > > > > Now, I know I have an issue in the way they're connected... one is > > attached to a Cisco 2970 (1 Gb/s), which is attached to a NetGear > > 100Mb/s switch, which has the other NAS attached to it. Yes, the > > NetGear is going to go away :-) And the NASes are going to > > wind up with > > a crossover cable between them for a straight, dedicated 1Gb/s But it > > certainly looks like rsync is not using more than a fraction of the > > (theoretically) available 100Mb/s There are several other hosts > > attached to the NetGear switch, and there is no "slowness" about them > > (which disproved my initial hypothesis of a saturated backplane) > > > > Is this a known rsync and/or Cygwin issue? > > As for you speed issues. From a Dual Xeon 3.2GHz to a dual P3 1GHz (both > Win2k3 server) using a single 500MB file for transfer I was able to get > 5.4MB/sec over a 100Mb LAN through at least 1 switch. Which is not too far > off the theoretical limit. That was from an active file server during the > middle of the day too. > > Using the -W whole file option didn't really help although it might with > lots smaller files. Turning on compression (-z) didn't help either and > should probably be turned off over a LAN anyway. > > Maybe try doing a simple file copy to see what throughput you can get
I creted a ~250MB test file and was able to scp it between these NASes at ~40mb/s rsync still was transferring at about 12 mb/s over a direct 1Gb/s link. sent 665653991 bytes received 78242 bytes 395210.59 bytes/sec total size is 62501572674 speedup is 93.88 rsync error: some files could not be transferred (code 23) at /home/lapo/packaging/tmp/rsync-2.6.6/main.c(791) real 31m47.484s user 1m49.609s sys 2m15.998s I am dealing with a lot of small files... about 50 GB of ~180,000 someodd files. I'll check out that -W, but is there anything else that might improve this seemingly-pathetic performance? -- *********************************************************************** * John Oliver http://www.john-oliver.net/ * * * *********************************************************************** -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
