FSYNCS 2311 and FSYNCS 869 on the same server?!?!?

[Netizen]

I got a new server from Hetzner with 2x SAS disks and 2x SATA disks, on Adaptec HW Raid 1.

I started by installing 2.3 version first (image from Hetzner) and run the benchmark:

pveperf
CPU BOGOMIPS: 80201.88
REGEX/SECOND: 1380442
HD SIZE: 19.84 GB (/dev/mapper/vg0-root)
BUFFERED READS: 111.62 MB/sec
AVERAGE SEEK TIME: 8.38 ms
FSYNCS/SECOND: 2311.24
DNS EXT: 53.48 ms

I then formated the server (several times) and installed Debian 7 and Proxmox on top of it using the guide here:
http://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_Wheezy


Since then everytime I run pveperf I am getting values similar to those:
CPU BOGOMIPS: 80198.88
REGEX/SECOND: 1264235
HD SIZE: 14.88 GB (/dev/mapper/vg0-root)
BUFFERED READS: 455.25 MB/sec
AVERAGE SEEK TIME: 3.26 ms
FSYNCS/SECOND: 869.97
DNS EXT: 49.00 ms


Why such a difference on the same server? By the way, the server is booting from a the SAS disks, not the SATA and this is where Proxmox is installed.

Any ideas???

 

[tom]

make sure that your server is idle when you run pveperf - best is you run pveperf 5 times, then use average.

• results are influenced by (among others):
• cache settings of your disks / raid controller
• filesystem (ext3/ext4)
• mount options
• IO scheduler (see http://pve.proxmox.com/wiki/IO_Scheduler)

 

[Netizen]

The server has NO virtual guests yet! So I guess totally idle.

fstab:
# /dev/sda1 during Installation (RescueSystem)
UUID=cff089e4-a236-4aa0-87f1-46d648538a1b /boot ext3 defaults 0 0
# /dev/sda2 belongs to LVM volume group 'vg0'
/dev/vg0/root / ext3 defaults 0 0
/dev/vg0/swap swap swap defaults 0 0
/dev/vg0/data /vz ext3 defaults 0 0

Hardware RAID 1:

Logical device number 1
Logical device name : SASARRAY
RAID level : 1
Status of logical device : Optimal
Size : 285686 MB
Read-cache mode : Enabled
MaxCache preferred read cache setting : Enabled
MaxCache read cache setting : Disabled
Write-cache mode : Enabled (write-back)
Write-cache setting : Enabled (write-back)
Partitioned : Yes
Protected by Hot-Spare : No
Bootable : Yes
Failed stripes : No
Power settings : Disabled

---

cat /sys/block/sda/queue/scheduler
noop anticipatory [deadline] cfq <<<<<<< Not sure about this. Do I need to do something about it?

 

[dietmar]

What mount options are in use in both cases? (use 'cat /proc/mounts' to obtain the values)