Re: [PVE-User] Slow speeds when KVM guest is on NFS

> So something is not good with QCOW2 disk format. I guess this is just because it changes a sequential write order to something more random. You will get different results if you use other benchmark tools ... ___ pve-user mailing list

Re: [PVE-User] Slow speeds when KVM guest is on NFS

On 11/16/2016 08:52 AM, Dietmar Maurer wrote: > >> 1) First guest inside qcow2 image, located on NFS share (via 10gbit > > What values do you get with raw images? > Just now converted guest's disk image to RAW, using default cache settings. Seeing much better results - same "dd" test now shows

Re: [PVE-User] Slow speeds when KVM guest is on NFS

> 1) First guest inside qcow2 image, located on NFS share (via 10gbit What values do you get with raw images? ___ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user

Re: [PVE-User] Slow speeds when KVM guest is on NFS

On 11/16/2016 01:22 AM, Brian :: wrote: > Hi Mikhail > > The guest that is running - what type of controller / cache? > > Thanks Brian, The guest is Debian Jessie, running VirtIO as controller and "Default (No cache)" cache setting. I tried both writeback / writethrough settings as well, but

Re: [PVE-User] Slow speeds when KVM guest is on NFS

Hi Mikhail The guest that is running - what type of controller / cache? Thanks On Tue, Nov 15, 2016 at 10:05 PM, Mikhail wrote: > On 11/16/2016 12:43 AM, Brian :: wrote: >> What type of disk controller and what caching mode are you using? > > The storage server is built

Re: [PVE-User] Slow speeds when KVM guest is on NFS

On 11/16/2016 12:43 AM, Brian :: wrote: > What type of disk controller and what caching mode are you using? The storage server is built with 4 x 4TB ST4000NM0034 Seagate disks, attached to LSI Logic SAS3008 controller. Then there's Debian Jessie with software RAID10 using MDADM. This space is

Re: [PVE-User] Slow speeds when KVM guest is on NFS

What type of disk controller and what caching mode are you using? On Tue, Nov 15, 2016 at 9:36 PM, Mikhail wrote: > On 11/16/2016 12:33 AM, Brian :: wrote: >> 90.4 MB/s isn't that far off. > > Hello, > > Yes, but I'm only able to get these results when doing simple "dd" test

Re: [PVE-User] Slow speeds when KVM guest is on NFS

Ignore my reply - just reread the thread fully :) NFS should work just fine.. no idea why you are seeing those lousy speeds. On Tue, Nov 15, 2016 at 9:33 PM, Brian :: wrote: > 90.4 MB/s isn't that far off. > > > On Tue, Nov 15, 2016 at 5:25 PM, Mikhail wrote:

Re: [PVE-User] Slow speeds when KVM guest is on NFS

90.4 MB/s isn't that far off. On Tue, Nov 15, 2016 at 5:25 PM, Mikhail wrote: > On 11/15/2016 06:09 PM, Gerald Brandt wrote: >> I don't know if it helps, but I always switch to NFSv4. > > Thanks for the tip. This did not help. I also tried with various caching > options

Re: [PVE-User] Slow speeds when KVM guest is on NFS

On 11/15/2016 06:09 PM, Gerald Brandt wrote: > I don't know if it helps, but I always switch to NFSv4. Thanks for the tip. This did not help. I also tried with various caching options (writeback, writethrough, etc) and RAW disk format instead of qcow2 - nothing changed. I also have LVM over

Re: [PVE-User] Slow speeds when KVM guest is on NFS

I don't know if it helps, but I always switch to NFSv4. nfs: storage export /proxmox server 172.23.4.16 path /mnt/pve/storage options vers=4 maxfiles 1 content iso,backup,images Gerald On 2016-11-15 08:48 AM, Mikhail wrote: Hello, Please help me to find why I'm seeing

[PVE-User] Slow speeds when KVM guest is on NFS

Hello, Please help me to find why I'm seeing slow speeds when KVM guest is on NFS storage. I have pretty standard setup, running Proxmox 4.1-1. The storage server is on NFS connected directly (no switches/hubs, direct NIC-to-NIC connection) via Gigabit ethernet. I just launched Debian-8.3 stock