F
fluke
Guest
Hi,
I have done a fresh install of Proxmox 1.4, then performed shrink of the volume group, so I could free space for a drbd device. Installation went fine, but I am having terrible performance problems - with only one machine running I have 10-30% IO delays. Here are some basic performance results (drbd was in primary/secondary mode and no VM's were running):
1. /dev/drbd0 - created according to the HOWTO, published on the proxmox site
Here speed is 13.2 MB/s
2. /dev/drbd1 - created on top of /dev/pve/data and mounted on /var/lib/vz with ext3 filesystem
Here speed is 39 MB/s
3. Regular volume
Here speed is 142MB/s
Any help and share of experience will be very much appreciated.
I have done a fresh install of Proxmox 1.4, then performed shrink of the volume group, so I could free space for a drbd device. Installation went fine, but I am having terrible performance problems - with only one machine running I have 10-30% IO delays. Here are some basic performance results (drbd was in primary/secondary mode and no VM's were running):
1. /dev/drbd0 - created according to the HOWTO, published on the proxmox site
Code:
time sh -c "dd if=/dev/zero of=/dev/drbdvg/vm-101-disk-1 bs=8k count=200000 &&sync"
200000+0 records in
200000+0 records out
1638400000 bytes (1.6 GB) copied, 123.873 s, 13.2 MB/s
real 2m3.878s
user 0m0.016s
sys 0m1.788s
Here speed is 13.2 MB/s
2. /dev/drbd1 - created on top of /dev/pve/data and mounted on /var/lib/vz with ext3 filesystem
Code:
time sh -c "dd if=/dev/zero of=/var/lib/vz/test3.raw bs=8k count=200000 &&sync"
200000+0 records in
200000+0 records out
1638400000 bytes (1.6 GB) copied, 6.71476 s, 244 MB/s
real 0m41.549s
user 0m0.024s
sys 0m4.312s
Here speed is 39 MB/s
3. Regular volume
Code:
time sh -c "dd if=/dev/zero of=/root/test3.raw bs=8k count=200000 &&sync"
200000+0 records in
200000+0 records out
1638400000 bytes (1.6 GB) copied, 4.20871 s, 389 MB/s
real 0m11.528s
user 0m0.012s
sys 0m2.948s
Here speed is 142MB/s
Any help and share of experience will be very much appreciated.