We had a similiar setup and used 5 backupjobs for each volume at the same time. For every volume of the nas server we split the work logicaly. So batch 1 took all directories starting with a-e, bath 2 all from f to h,.... We could backup our nas device in about 12 hours with 11mio files.
Regards Spex > -----Ursprüngliche Nachricht----- > Von: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] Im > Auftrag von Haberstroh, Debbie (IT) > Gesendet: Donnerstag, 6. Dezember 2007 14:55 > An: ADSM-L@VM.MARIST.EDU > Betreff: NetApp backup takes too long > > Good morning, > > I could use some suggestions for improving the backup time > for our Network Appliance. Below is the write up that my Sys > Admin submitted describing the problem. Thanks for the help. > > Situation: We have a Network Appliance (NAS) hosting > approximately 8 million Windows files (CIFS). Due to disk > constraints, we are not able to use snapshots and due to some > other customer induced limitations, we cannot use NDMP for > backups. We have implemented a "proxy"/redirection server > that backs up the CIFS files via a unc path name to a TSM > 5.33 host running AIX. Our issue is in walking through 8 > million files per night in a backup job. The nightly backup > delta is approximately 40GB. However, just to access and > check 8 million files to see if they meet the backup criteria > is taking too much time. The CIFS backup is split into 3 > separate batch jobs that run simultaneously. The longest job > (about 3 million files) takes almost 20 hours to run. Would > NIC teaming gain us any time savings during the backup? I > feel the bottleneck may be our AIX system since the Windows > server has to get the meta data for the CIFS file, check it > against the TSM database, and determine if that file needs to > be backed up. That is a lot of traffic between Windows host, > TSM server, and Network Appliance for every single file. > During the backup time, the CPU is at about 70% on the > Windows host, and the NIC is rarely higher than 50%. > > TSM Server Information: > We are running TSM 5.3.3 on AIX 5.3. The server is an IBM > 7026-6H1, 4 processors and only 2 Gb Ram. The TSM database > is almost 200 Gb with 300 clients. > > Windows Server Information: > We are currently using the Windows TSM client version 5.33c > under Windows 2003 Server Standard Edition on an HP DL380 > dual 2.8 GHz Xeon processor with 2.5 GB of RAM. We have > three batch files running the DSMC command line utility > scheduled by the Windows scheduler. We have a dual port HP > NC7781 NIC card. We are using only one port connected at 1GB. > > > Debbie Haberstroh >
