Slow Disk Perfomance on Node

[r0g]

Hi,

i just noticed that i have really bad disk perfomance on my proxmox node.
Here is what´s inside:

2 x 3TB 6Gb-s 7200rpm HDD
Core i7-2600 3,40GHz
32GB DDR4 RAM

The HDDs are working as a RAID1 via Software RAID.
Before installing proxmox "hdparm -tT /dev/mapper/vg0-data" gives me:

/dev/mapper/vg0-data:
 Timing cached reads:   26420 MB in  2.00 seconds = 13222.69 MB/sec
 Timing buffered disk reads: 510 MB in  3.01 seconds = 169.71 MB/sec

After installing:

/dev/mapper/vg0-data:
 Timing cached reads:   11070 MB in  2.00 seconds = 5537.15 MB/sec
 Timing buffered disk reads:  16 MB in  3.66 seconds =   4.37 MB/sec

Whats wrong?

 

[tom]

do you mdraid? see https://pve.proxmox.com/wiki/Software_RAID

Instead of this, I suggest you re-install using ZFS and then add a fast SSD based ZIL device to improve performance. ZFS is fully supported and have a lot of advantages.

hdparm is not a good tool for reliable benchmarking, better use fio (or similar).

 

[r0g]

Bought a new server with hardware raid. Runinng much better - Thank you.