Mike Dresser wrote: > > > Matthias Meyer wrote: >> Dear all, >> >> How scalable is backuppc? >> Where are the limits or what can produce performance bottlenecks? >> >> I've heard about hardlinks which can be a problem if theire are millions >> of it. Is that true? >> > The file system can become... interesting to fix or backup when you get > a few million hard links, especially if you're using XFS. There > _appears_ to be some bugs in Debian etch's xfs tools, last time I had to > run an xfs_repair -n on etch it took 6 days.. after upgrading to lenny > it takes about 10 minutes or so. I'm guessing there were some major > improvements in the xfs tools from etch to lenny with regards to memory > usage. >> Anyone would share his experience about CPU usage in relation to >> bandwidth usage? Particularly by using rsync? >> > I see about 2-15m/s on our rsync backups CPU usage is pretty low, it's > mostly disk i/o that holds it up. The newer faster machines back up > faster, so there's a bottleneck on the clients as well. > >> I have a 2x1GHz Server with 2GB RAM and 4x500GB SATA Disks in Software >> Raid5. >> > server here is a 2x1.8ghz opteron 265, 5GB ram, 8x1TB with 3ware raid5. > Backup window is set from 18:00 to 23:00, it generally finishes all the > backups within that 5 hours. Full's every 8 days, incr every day. > > * Pool is 1852.64GB comprising 8466234 files and 4369 directories > (as of 3/12 02:26), > * Pool hashing gives 9654 repeated files with longest chain 85, > * Nightly cleanup removed 7189 files of size 35.62GB (around 3/12 > 02:26), > * Pool file system was recently at 44% (3/12 12:05), today's max is > 44% (3/12 00:00) and yesterday's max was 44%. > > There are 42 hosts that have been backed up, for a total of: > > * 789 full backups of total size 10819.30GB (prior to pooling and > compression), > * 284 incr backups of total size 913.00GB (prior to pooling and > compression). > I backup 10 PCs (Linux & Windows) from LAN and 8 PCs (Windows) over Internet Pool is 182.54GB comprising 1008528 files and 4369 directories (as of 3/13 02:29), Pool hashing gives 28891 repeated files with longest chain 20, Nightly cleanup removed 1472 files of size 4.77GB (around 3/13 02:29), Pool file system was recently at 47% (3/13 19:20), today's max is 47% (3/13 02:00) and yesterday's max was 48%. There are 18 hosts that have been backed up, for a total of: 107 full backups of total size 929.57GB (prior to pooling and compression), 112 incr backups of total size 122.94GB (prior to pooling and compression).
Whats the meaning of 2-15m/s? br Matthias -- Don't Panic ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/