IceBoosteR
Guru
- Joined
- Sep 27, 2016
- Messages
- 503
Hello guys,
maybe you can help me with my problem.
At the moment I have a third FreeNAS Server which is running on an ESXi host (alone at the moment).
So the host has 2x Xeon L5630 (4c/8t each) and 56 GB ECC RAM and a QLogic dualport 4GB FC card which is passed thru to the FreeNAS vm which has 8vCPU and 40GB RAM. Via FC I have connected a NetApp DS14MK4 wiht dual ESH4 controller and 14x 450GB 15.000RPM disks.
I have only one port connected - and I have really slow read and write speeds. While copying data to that machine, every minute the transfer drops to 0kb/s for some seconds and goes up to about 72MB/s in peak. This is waaay to slow. Everything is connected with gigabit and those disks are in one RAIDZ3 (yeah i know the risks about vdev size - does not matter here).
I did some previous tests, one FC cable all disks in RAID0 under Windows and a performance of nearly 400MB/s in read, and 130MB/s in write operation was seen.
I know there is an impact as FreeNAS has to write parity also, but it there a way to speed this things up? I can also see 100% disk busy, but I did not expect this from 15k disks...
Maybe the FC-ESH controller is the bottleneck, is multipathing an option here to speed those things up?
I cannot believe that the disks are sooo slow.
Regards
IceBoosteR
maybe you can help me with my problem.
At the moment I have a third FreeNAS Server which is running on an ESXi host (alone at the moment).
So the host has 2x Xeon L5630 (4c/8t each) and 56 GB ECC RAM and a QLogic dualport 4GB FC card which is passed thru to the FreeNAS vm which has 8vCPU and 40GB RAM. Via FC I have connected a NetApp DS14MK4 wiht dual ESH4 controller and 14x 450GB 15.000RPM disks.
I have only one port connected - and I have really slow read and write speeds. While copying data to that machine, every minute the transfer drops to 0kb/s for some seconds and goes up to about 72MB/s in peak. This is waaay to slow. Everything is connected with gigabit and those disks are in one RAIDZ3 (yeah i know the risks about vdev size - does not matter here).
I did some previous tests, one FC cable all disks in RAID0 under Windows and a performance of nearly 400MB/s in read, and 130MB/s in write operation was seen.
I know there is an impact as FreeNAS has to write parity also, but it there a way to speed this things up? I can also see 100% disk busy, but I did not expect this from 15k disks...
Maybe the FC-ESH controller is the bottleneck, is multipathing an option here to speed those things up?
I cannot believe that the disks are sooo slow.
Regards
IceBoosteR