JEckstrom at davita.com
Fri Jul 16 19:36:45 GMT 2004
I'm looking at using Rsync to synchronize 600 Windows servers across the country to a central location. I'll be synchronizing about 15-20 gigs of data, but the vast majority will never change... every now and then, we would have to add new files, ranging in size from a few bytes to 1.5GB. Each server is on a slow frame relay connection and will be limited to 3KB/sec. The connections are reasonably reliable, however we would definitely want the ability to resume an incomplete download. The central rsync server could run Linux if there was a performance benefit.
What kind of a load could a single fairly beefy server take? It'd have dual 3+ghz processors, a couple gigs of memory, striped and mirrored SCSI RAID. I'm estimating that at peak times we'll range between 20-25Mbps, possibly as much as 35. I could probably divide the load between a few servers, but I'd like to stick with one if it would work. Does rsync running as a daemon take advantage of multiple processors?
What kind of overhead does compression add to a session? Does wrapping rsync in ssh cause as much of a performance hit as compression?
What's the difference between --bwlimit and --bwlimit-mod?
Thanks a lot for your help!
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