We have a large amount of VMs on NetApp, have to backup all CIFS share, VMs, SQL and Exchange and other applications daily. Lately we have some VM performance issues, we doubted the backups, specially VM, big SQL and Exchange backups generated too much read traffic and slow the NetApp performance. can someone share your experience and solutions?
If we're talking about traditional backup, reading blocks and files from the filer, yes, there's a good possibility of it being the culprit.
Backup operations normally puts significant pressure on the array. Of course, some feels it harder when having small aggregates or slow disks. But in my experience, almost 100% of my customers have a turbulent environment when in backup windows.
If you have AIQUM or NAbox, you could easily check if during the backups you latency and disk utilization is putting your VMs in bad shape.
If that is the case suggestions would be (some may not apply, it all depends on your environment):
- reschedule backups so they does not compete for resources
- add more disks
- rethink your volume placement
- you could change your env making snaps in a primary storage and replicating efficiently with snapmirror/vault to another filer.