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proxmox raid

ictdude

29-08-2010, 23:27

Originally Posted by darkfyre

I changed my i7-4T to RAID-10 (hardware) running proxmox

performance as follows:

Code:

power:/home/darkfyre# pveperf CPU BOGOMIPS: 44688.21 REGEX/SECOND: 1020141 HD SIZE: 94.49 GB (/dev/mapper/pve-root) BUFFERED READS: 199.79 MB/sec AVERAGE SEEK TIME: 8.27 ms FSYNCS/SECOND: 2629.33 DNS EXT: 101.90 ms DNS INT: 16.92 ms (nullroutes.com) power:/home/darkfyre#

pretty impressive with RAID-10

anyone with raid5/6 who can share results to compare?

Damn that looks good. But for this you need minimal 4 disks. And a i7-4T
has 4 disks... I have a i7-2T so 2 disks. I tuned my performance by using this setting:

First i did check the read ahead cache settings default it has a value of
256 by setting this to 16384 i had a performance boost of 45 %

You can check your 3ware settings with command:

blockdev --getra /dev/sda

it will list the current read ahead cache settings for block device sda.
To change this for example use command:

blockdev --setra 16384 /dev/sda

Then do a pveperf again and see what the performance is. I did find this info on the 3ware site It did work good for me...

My performance with 2 disks:

CPU BOGOMIPS: 42557.97
REGEX/SECOND: 431794
HD SIZE: 9.92 GB (/dev/sda1)
BUFFERED READS: 98.78 MB/sec <---- Befor this settings it was like 45 MB/sec
AVERAGE SEEK TIME: 7.35 ms

So more then 45 % better now. So your raid 10 could do better i think ..

yonatan

27-08-2010, 20:56

EG Hybrid
no raid

:~# pveperf
CPU BOGOMIPS: 42557.99
REGEX/SECOND: 539465
HD SIZE: 72.97 GB (/dev/sda1)
BUFFERED READS: 216.46 MB/sec
AVERAGE SEEK TIME: 0.25 ms
FSYNCS/SECOND: 1426.23
DNS EXT: 38.04 ms
DNS INT: 18.85 ms (ovh.net)

( first disk formated only ) - don't ask me why .. this is what the client asked for :-)

darkfyre

27-08-2010, 20:33

I changed my i7-4T to RAID-10 (hardware) running proxmox

performance as follows:

Code:

power:/home/darkfyre# pveperf
CPU BOGOMIPS:      44688.21
REGEX/SECOND:      1020141
HD SIZE:           94.49 GB (/dev/mapper/pve-root)
BUFFERED READS:    199.79 MB/sec
AVERAGE SEEK TIME: 8.27 ms
FSYNCS/SECOND:     2629.33
DNS EXT:           101.90 ms
DNS INT:           16.92 ms (nullroutes.com)
power:/home/darkfyre#

pretty impressive with RAID-10

anyone with raid5/6 who can share results to compare?