UNSOLVED
agent vs cbt based bakcup
Hi,
we're having a customer who is making an agent based backup of a windows file server to a DD.
avtar Info <5156>: Backup #1687 timestamp 2015-11-13 11:53:43, 16,962,516 files, 4,518,608 folders, 6,349 GB (17,697 files, 2.508 GB, 0.04% new)
avtar Info <6083>: 2acked-up 6,349 GB in 891.15 minutes: 427 GB/hour (1,142,063 files/hour)
So it's doing 1.1m files/hour but they are starting to run out of there backupwindow.
This file server is a VM on a vsphere cluster. With the small amount of changes(0.04%), would it be an option to change this to a CBT based solution?
Regards,
John
We have some spare capacity on the DD backend. I think we're just going to give it a try. Let's see what the difference in performance is and not only the backup but als a restore.
That VMware CBT issue should be resolved(yesterday):VMware KB: VMware ESXi 6.0, Patch ESXi600-201511401-BG: Updates esx-base
ionthegeek
2 Intern
•
2049 Posts
755
2
Posted November 24th, 2015 10:00
VM Image backups can be a good option for large file servers if you're being limited by the number of files that have to be processed every day. Please be aware of the recent EMC Technical Advisory that applies to ESXi 6 environments:
ETA 209601: Avamar, NetWorker: VMware image backups from ESXi 6.0 hosts may lose data written to the VM disk during snapshot consolidation processes
When moving from file system backups to image backups, you are likely to see a capacity jump so please keep that in mind.
Generally speaking, NDMP would be my choice for file backup because asking the hardware for a list of changed files is much faster than having to check each file individually. NDMP does require a NAS device, however so I know that's not an option for everybody.