01-27-2015 02:15 AM
Hi Guys
Need some advice on backup solution regarding Netbackup . We have a 2TB volume on a file server and have installed Netbackup 2.6.0.3 running server 2012. the 2TB of data has loads of small files and also Enterprise vault place holders so windows journal can’t really kick in . We have accelerator and client dedupe enabled
Using windows based backups it’s taking 23hrs to backup. Someone suggested using flash backups? We cannot use off host backups as the Media Server is a Netbackup 5230 appliance and does not support iSCSI
Really need to bring the backup window down as I have a similar volume of 6TB to also migrate into Netbackup
Kind Regards
01-27-2015 04:37 AM
You can try flashbackup for windows. It will back up the underlying FS blocks. If your disk has a relatively good performance then it will be fairly quick.
Have you tried using accelerator with out change journal. I've seen it go faster when its disabled in some instances.
Also, you can run collections on EV volumes so that the small files are collected and placed into CAB files (zipped up so to speak).
02-02-2015 01:56 AM
Ran a couple of test with Flash backup on a 1TB data filled volume and not too sure I understand the logs
I ran two full backup with Media -side dedupe enabled and got the following for both Flashbackn and Agent bakcups
FlashBackup
Time Taken ( hrs) |
Average Speed (KB per second) |
Other stats in logs |
8.33 |
70398 |
scanned: 2150144522 KB, CR sent: 19967712 KB, CR sent over FC: 0 KB, dedup: 99.1%, cache disabled |
7.43 |
78063 |
scanned: 2150144535 KB, CR sent: 14447986 KB, CR sent over FC: 0 KB, dedup: 99.3%, cache hits: 17404382 (98.9%), rebased: 13151 (0.1%) |
If so I‘m confused why on a full backup it says:
scanned: 2150144522 KB = 2TB
sent: 19967712 KB = 19GB = approx. 0.009%
to me this implies that the de-duplication was done on the client side ???
Agentbased Backup
Time(hrs) |
Average Speed (KB per second) |
Other stats in logs |
7.39 |
36288 |
scanned: 995909378 KB, CR sent: 1148058 KB, CR sent over FC: 0 KB, dedup: 99.9%, cache disabled |
1.42 |
164579 |
scanned: 995909378 KB, CR sent: 764916 KB, CR sent over FC: 0 KB, dedup: 99.9%, cache disabled |
Any thoughts or explanation on theses stats
02-02-2015 04:24 AM
It backed up 2TB because your volume is 2TB (50% used). Remember I said it backs up the file system blocks, not the files that reside on the file system.
CR sent meant that only that amount was transferred between the deduplication engine and the content router (CR).
02-05-2015 02:29 AM
Flashbackup is better suited for 'nearly full' volumes.
The block-level backup is described in the Snapshot Client manual.
02-05-2015 08:28 AM
The main issue is we were wondering whats the best way to backup the following data in the senario below
02-10-2015 11:36 PM
What the the main Pros and Cons with Flashbackups and Traditional Accelerator MSDP backups
Are all the above correct ? i really need to compile a list for my manager so we can decided whch way to proceed
02-11-2015 12:37 AM
4. You should get better performance when restoring with FlashBackup (if restoring everything). Otherwise it would be pretty much the same.