I am running a phusical server 2012R2 with 12 2 TB disks connected, using storage spaces mirror with 4 coloums, interleave at 262144.
This server is the proxy.
Deduplication is not enabled.
FIlesystem is NTFS formatted for large volume. 10,9 TB 64 KB chunk size.
2 SSD disks for write cache at 100 GB total (mirror)
I attached a qlogic FC adapter to the system, and in our fc switch, where our 3par 7200 array is connected.
Some time ago, before i took this into production i ran a test backup with a test server on a test lun, the first full backup i got over 250 MB / Sec write speec. (forever forward incremental)
After this, i started using the system for all our backups, and im currently using 9,5 TB.
However if i create a new backup job of the same test server, located on the same test lun, my speed have dropped to 150 MB / Sec. For other jobs speeds are varying between 80 MB / Sec and 130 MB / Sec, however theese backups are forever forward, and i assume the first full backup will be fastest because of sequential IO.
I can cot understand why the speed of a fresh full backup job from the same server have dropped so much.
I should be getting a lot more than 150 MB / Sec, and maybe also more than 247 MB / Sec The test server i'm using might have been thin provisioned at the first run a long time ago, and now it is thick provisioned lazy zeroed.
I am talking about processing rate when i am talking about the speed, and not throughput all time.
03-03-2016 15:42:10 :: Using backup proxy 10.1.50.2 for disk Hard disk 1 [san]
03-03-2016 15:42:11 :: Hard disk 1 (95,0 GB) 49,1 GB read at 134 MB/s [CBT]
03-03-2016 15:32:46 :: Load: Source 99% > Proxy 82% > Network 18% > Target 0%
First run on 12/12-2015:
12-12-2015 23:19:29 :: Using backup proxy 10.1.50.2 for disk Hard disk 1 [san]
12-12-2015 23:19:31 :: Hard disk 1 (95,0 GB) 63,6 GB read at 247 MB/s [CBT]
12-12-2015 23:24:55 :: Load: Source 99% > Proxy 85% > Network 41% > Target 1%
It shows that veem's been waiting the longest for source, which is 3par system. It doesnt make any sense to me...