[PVE-User] software RAID in 4.2
miguel_3_gonzalez at yahoo.es
Mon Jan 23 18:34:11 CET 2017
root at myserver:~# cat /proc/mdstat
Personalities : [raid1]
md4 : active raid1 sda4 sdb4
1931980736 blocks [2/2] [UU]
bitmap: 11/15 pages [44KB], 65536KB chunk
md2 : active raid1 sda2 sdb2
20478912 blocks [2/2] [UU]
Considering hdparm reports same speed for the underlying disk and the
soft raid seems some settings that need to be set. I´m asking here just
to be safe in terms of proxmox and not to be too aggressive. My
impression is that with ext3 I got better performance.
On 01/23/17 5:33 PM, Daniel wrote:
> i would say it more a softraid problem.
> What you get when you do „cat /proc/mdstat“
> Maybe still rebuilding.
>> Am 23.01.2017 um 16:35 schrieb Miguel González <miguel_3_gonzalez at yahoo.es>:
>> Dear all,
>> I´m running Proxmox 4.2 onto a software RAID of 2 Tb SATA disks of
>> 7200 RPM.
>> I have set it up using OVH Proxmox installer with ext4. I have
>> realized that another server with just one SATA disk has writes of about
>> 140 MB/s while this server with 2 disks has just writes around 40 MB/s:
>> root at nyserver:~# hdparm -Tt /dev/sda
>> Timing cached reads: 11800 MB in 2.00 seconds = 5903.84 MB/sec
>> Timing buffered disk reads: 136 MB in 3.17 seconds = 42.94 MB/sec
>> root at myserver:~# hdparm -Tt /dev/md4
>> Timing cached reads: 11356 MB in 2.00 seconds = 5682.49 MB/sec
>> Timing buffered disk reads: 132 MB in 3.10 seconds = 42.52 MB/sec
>> I´m running 4.4.15-1-pve kernel.
>> Is there any way to improve the performance of writes?
>> pve-user mailing list
>> pve-user at pve.proxmox.com
> pve-user mailing list
> pve-user at pve.proxmox.com
More information about the pve-user