Hello I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very increases. It consumes up to 99%. For this reason, slowing down the other virtual machine. What should I do to solve the problem. ? Thanks..
On 08/02/16 02:12 PM, Gokan Atmaca wrote:> Hello > > I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very > increases. It consumes up to 99%. For this reason, slowing down the > other virtual machine. What should I do to solve the problem. ? > > Thanks..I'm guessing you're using standard 7,200rpm platter drives? You'll need to share more information about your environment in order for us to provide useful feedback. Usually though, the answer is 'caching' and/or 'faster disks'. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education?
> I'm guessing you're using standard 7,200rpm platter drives? You'll need > to share more information about your environment in order for us to > provide useful feedback. Usually though, the answer is 'caching' and/or > 'faster disks'.Yes , 7.2k rpm disks. 2T mirror (soft). In fact, I had such a preference for slightly more capacity. Unfortunately very expensive SAS drives. But this works only if the server in question occur. In this case, about 15 minutes. progress. On Mon, Feb 8, 2016 at 9:13 PM, Digimer <lists at alteeve.ca> wrote:> On 08/02/16 02:12 PM, Gokan Atmaca wrote: >> Hello >> >> I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very >> increases. It consumes up to 99%. For this reason, slowing down the >> other virtual machine. What should I do to solve the problem. ? >> >> Thanks.. > > I'm guessing you're using standard 7,200rpm platter drives? You'll need > to share more information about your environment in order for us to > provide useful feedback. Usually though, the answer is 'caching' and/or > 'faster disks'. > > -- > Digimer > Papers and Projects: https://alteeve.ca/w/ > What if the cure for cancer is trapped in the mind of a person without > access to education? > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt
Are the disk partitions properly aligned to 4k boundary on the host (and in the guests too) ? See http://www.ibm.com/developerworks/library/l-linux-on-4kb-sector-disks/index.html and this: http://unix.stackexchange.com/questions/247387/check-if-partitions-are-aligned-properly-for-performance On 2/8/2016 8:12 PM, Gokan Atmaca wrote:> Hello > > I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very > increases. It consumes up to 99%. For this reason, slowing down the > other virtual machine. What should I do to solve the problem. ? > > Thanks.. > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt
> Are the disk partitions properly aligned to 4k boundary on the host (and in > the guests too) ? >There are 5 in total server. 32G ram. 2T r1 (soft) disk. On Mon, Feb 8, 2016 at 9:41 PM, Zoltan Frombach <zoltan at frombach.com> wrote:> Are the disk partitions properly aligned to 4k boundary on the host (and in > the guests too) ? > > See > http://www.ibm.com/developerworks/library/l-linux-on-4kb-sector-disks/index.html > and this: > http://unix.stackexchange.com/questions/247387/check-if-partitions-are-aligned-properly-for-performance > > > On 2/8/2016 8:12 PM, Gokan Atmaca wrote: >> >> Hello >> >> I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very >> increases. It consumes up to 99%. For this reason, slowing down the >> other virtual machine. What should I do to solve the problem. ? >> >> Thanks.. >> _______________________________________________ >> CentOS-virt mailing list >> CentOS-virt at centos.org >> https://lists.centos.org/mailman/listinfo/centos-virt > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt