John Summerfield wrote: > Mark Schoonover wrote: >> Benjamin Smith wrote: >>> On Wednesday 17 January 2007 04:41, Karanbir Singh wrote: >>>> Fajar Priyanto wrote: >>>>> I have a task on setting up a cluster of 2 servers for providing >>>>> ftp service. We use RH's Cluster suite. However the cluster setup >>>>> is lack of shared network storage, so the /var/ftp/pub is mounted >>>>> on each server. The cluster is set >>>>> >>>>> So, are we on the right direction? Or is there any better way? >>>>> Thank you very much, >>>>> >>>> have you considered using drbd ? >>> Well, I was going to suggest using RAID1 with one of the partitions >>> being a network block device, but this looks even better! >>> >>> Rsync is great for period backups (not more than once per day or so) >> >> I run rsync every hour on multi-terrabyte systems with no problems. >> The NASes do have a private GB network to push the data through, so >> the user network doesn't see the network traffic generated by rsync. >> I can have anywhere from just a couple hundred megs, to 100 gigs of >> data change inside of an hour. > > OTOH I found running rsync daily over the Internet to backup a Linux > box impractical; it used heaps of RAM (and swap) and ran for hours. > Fortunately, its excessive use of swap (several times real RAM) didn't > lead to thrashing. > This seems rather odd performance for rsync. As I type this, I'm sending 800GB to a new server, and rsync is using 28MB of RAM. I don't think network speed is an issue with how much RAM/SWAP is getting used by rsync. Could you post your rsync command, I'm curious to what your running. What version of rsync are you using?? > Now, I run a hand-crafted script that makes a compressed ISO > (mkzftree) and I rsync that. I'm maintaining a backup filesystem of > about 8 Mbytes remotely now; the rsync runs for a little over two > hours daily. That's what I love about *NIX, more than one way to skin a cat! Thanks! Mark Schoonover IS Manager American Geotechnical - California, Nevada and Arizona V-> 858.450.4040 F-> 714.685.3909 C-> 858.472.3816 * software development * systems administration * networking * security *