Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Slow performance of EXT4 drive using Libvirt/KVM/QEmu

Posted on 2010-09-16
1
Medium Priority
?
2,003 Views
Last Modified: 2012-05-10
Hi experts,

How long should it take to format a 650GB drive to ext4? I am starting up my virtual machine using virsh and then formatting the additional drive which takes 7-8 hours. I am worried that performance will be an issue.

The disk part of my libvirt definition looks like this

    <disk type='file' device='disk'>
      <source file='/vm/ubuntu-kvm/root.qcow2'/>
      <target dev='hda' bus='ide'/>
    </disk>
    <disk type='file' device='disk'>
      <source file='/vm/ubuntu-kvm/data.qcow2'/>
      <target dev='hdb' bus='ide'/>
    </disk>

From what I've read I can try disable the cache somehow, but I'm not entire surely how, since the examples given were invoking kvm directly rather than through virsh. Any ideas?
0
Comment
Question by:mstrelan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 10

Accepted Solution

by:
mstrelan earned 0 total points
ID: 33698166
Oh I've got it! Now it only takes 3-4 minutes instead of 7-8 hours!

   
     
     
     
   
0

Featured Post

Application Discovery Service in AWS

In the era of the cloud, customers migrating away from their existing on-premise infrastructure. This requires lots of planning, strategies, and effort to identify their existing resources and determine how best to migrate.  Datacenter migrations happen in four phases -

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Google Drive is extremely cheap offsite storage, and it's even possible to get extra storage for free for two years.  You can use the free account 15GB, and if you have an Android device..when you install Google Drive for the first time it will give…
Is your phone running out of space to hold pictures?  This article will show you quick tips on how to solve this problem.
This course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Suggested Courses

715 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question