Weird performance issues

[geordi]

Hi there

I have some weird performance issues in the environment of one of our customers...

The backup performance is incredibly slow at the moment and I have no clue...

Some infos about the environment:

4 ESX Hosts with local VMFS storage (RAID5 and RAID10 with BBU and Caching, no THIN-provisioning)
Veeam installed as VM on one of the hosts (5.0.2.224)
1 or 2 dedicated GBit LAN Ports for VMKernel per Host
1 up to 4 dedicated LAN Ports for normal network traffic per Host
Synology NAS connected with 1GBit
everything connected to a 48port HP GB-Switch
ESXi embedded 4.1 with installed Patch Level ESXi410-201107001

When making a backup from one machine (NBD with CTK enabled) the performance is really slow, only 2-3MB/s.
But on some machines the backup performance is fine. My first idea was a host issue, but I have made a backup for example from one machine on host 2 in 40 minutes (first backup, 100GB vmdk with 70GB used) and another one on the same host took 10 hours (first backup, 100GB vmdk with 40GB used).

Code: Select all

4 of 5 files processed 

Total VM size: 100,00 GB
Processed size: 2,00 GB
Processing rate: 3 MB/s
Backup mode: HOTADD/NBD with changed block tracking
Start time: 02.11.2011 07:41:43
Time remaining: 10:18:48

Backing up object "[ESX-Datastore-ESX1]WTS10/WTS10.vmdk"

Any tips, ideas, hints where to look or find some screws for finetuning?

[Vitaliy S.]

Hello Michael,

It is expected to have various processing rate for different VMs, see this topic for more details: Very different backup speed on VM's

Out of curiosity, what is the VM (WTS10) you're backing up, is it transitionally active like Exchange or SQL Server? And what is the backup job destination target?

Thanks!

[geordi]

I will have a closer look at the JOB details in the next days, maybe I can get something from that...
WTS10 is a SRV2003 64Bit TerminalServer ... without any special features like SQL or so.

Target for all backups is the Synology NAS