Les Mikesell wrote at about 07:45:50 -0500 on Thursday, April 9, 2009: > Thomas Karcher wrote: > > Hi Ski, > > > >>> Performance is of course not really great but surprisingly good. I > >>> evaluated (very shortly) against mounting via NFS, and NFS just sucks > >>> with backuppc. > >> I think it depends on the NFS server you are using. I have over 1500 > >> clients backing up via 7 backuppc servers attached via nfs to a high > >> performance Exastore NAS device. Works great. > > > > Ah, yes, that's possible, I have a much "cheaper" environment - and also > > a setup smaller by magnitudes. I had the impression that many very small > > disk accesses (as backuppc does when checking for newer file version > > etc.) is already a bad disk usage pattern by itself. And NFS didn't > > handle it better either ... > > > > Anyway, nice to know that a specialized NAS device could help there. > > Usually you are waiting on disk head motion - and if you run nfs in sync > mode you wait for completion on every write. The things that can help > are lots of physical disks in the volume (better odds for the head to > already be near the right place) and running async with lots of > buffering. Expensive devices might even have some battery-backed or > nonvolatile buffering.
Just as an FYI, running in 'async' mode significantly speeds up NFS for exactly the reason alluded to above. > > -- > Les Mikesell > [email protected] > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > http://p.sf.net/sfu/www-ibm-com > _______________________________________________ > BackupPC-users mailing list > [email protected] > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: http://backuppc.wiki.sourceforge.net > Project: http://backuppc.sourceforge.net/ > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
