[pve-devel] Improve the I/O in PVE

[Cesar Peschiera]

Correct Dietmar

But i am saying that if the images of the VMs are in a file system and not in a partition LVM of block of disks, may be that change the "io=native" to "io=threads" give us more  speed access of disk in input/output

And as in mode native "PVE" use a file system as storage, may be convenient that pve-manager see if the image of the VM is in a  file system or is in a partition of blocks of disks (that is possible with a VG of LVM partition), and depending of this condition,  what IO should use pve-manager to raise KVM and gain more speed of access disk

But as I have not tried it yet, I can not confirm that this change will be appropriate.
  ----- Original Message ----- 
  From: Dietmar Maurer 
  To: Cesar Peschiera ; pve-devel at pve.proxmox.com 
  Sent: Wednesday, June 11, 2014 2:37 PM
  Subject: RE: [pve-devel] Improve the I/O in PVE


  AFAIK we already use native aio

   

  From: pve-devel [mailto:pve-devel-bounces at pve.proxmox.com] On Behalf Of Cesar Peschiera
  Sent: Mittwoch, 11. Juni 2014 19:40
  To: pve-devel at pve.proxmox.com
  Subject: [pve-devel] Improve the I/O in PVE

   

  Hello

   

  In this link i see how improve the I/O in PVE when a image of disk is used, may be that will be better to do changes in the next release of pve-manager

  I don't have tested, but may be that someone can do it?

   

  io=native    => for block device based VMs.
  io=threads  => for file-based VMs.


  http://www.sebastien-han.fr/blog/2013/08/12/openstack-unexplained-high-cpu-load-on-compute-nodes/

   

   
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