Hi all
i am using qcow2 image format , I create a backing file and to the new
image i preform some I/O
qemu-img create -f qcow2 -b snap1 guestqcow2
Now I wanted to merge snap1 with guestqcow2. Is their is any command which
can merge both disk into one single file
--
*Pankaj Rawat*
Hi all,
--
*Pankaj Rawat*
Hi all,
I am currently using backing file.The question of my concern is regarding
the I/O operation
Now when we create a external snapshot in qcow2, a new file is created
leaving the original file as backing file
*
Can any one tell,*how the I/O is performed in detail way?.
Means when the new snap
Hi all,
I am currently using backing file.The question of my concern is regarding
the I/O operation
Now when we create a external snapshot in qcow2, a new file is created
leaving the original file as backing file
*
Can any one tell,*how the I/O is performed in detail way?.
Means when the new snap
any one explain why it is happening ?
and how can i fix it ?
--
*Pankaj Rawat*
Thanks for the reply .
we can change the cluster_size by *qemu-img* command
but how can we change* L1/L2 table size *?
On Mon, Mar 12, 2012 at 3:17 PM, Stefan Hajnoczi wrote:
> On Mon, Mar 12, 2012 at 9:12 AM, PANKAJ RAWAT
> wrote:
> > Hi all i have a kvm machine and i use qed f
Hi all i have a kvm machine and i use qed format as the disk image format
I want to improve the I/O performance of my machine
can anyone tell other then cluster_size and cache what are the tunining
parameters for qed so that i can improve the performance of my VM ?
--
*Pankaj Rawat*
yes ofcourse
here is the output
*[root@t06 p]# ls -lsh*
*total 1.4M*
*1.4M -rw-r--r-- 1 root root 8.1G Mar 12 09:10 guest*
On Wed, Mar 7, 2012 at 10:00 PM, Mulyadi Santosa
wrote:
> have you double checked by using "ls -lsh" command? :)
>
--
*Pankaj Rawat*
Hi all
can anyone tell how i can migrate a VM (qed disk format)?
what is the process by which can we migrate the image from one KVM to
another ?
--
*Pankaj Rawat*
size ?
i.e 4GB will be allocated and rest 4GB can be allocated dynamically
--
*Pankaj Rawat*
Hi all
can anoyone explain about backing file?
How it is written and in which fashion ?
and what role it plays when the clusters are allocated ?
Thanks for the reply
On Thu, Feb 23, 2012 at 3:46 PM, Stefan Hajnoczi wrote:
> On Thu, Feb 23, 2012 at 10:02 AM, PANKAJ RAWAT
> wrote:
> > Is the degrade in performance is only due to allocation of large cluster
> > during expansion of qcow2 image ?
> >
> > Bu
> On Thu, Feb 23, 2012 at 11:01:46AM +0530, PANKAJ RAWAT wrote:
> > I theory regarding cluster size it is written that as the size of
> cluster
> > increase performance should increase.
> >
> > But something surprising happen The performance is degrading as the size
>
size : 64K697Mb/sec** (aggrb MB/sec)*
*
Cluster size : 1M 440Mb/sec* *(aggrb MB/sec)*
*
*
* Cluster size : 2M 289Mb/sec** (aggrb MB/sec)*
as in above it can bee seen that the 64k is performing better
can any one tell why ?
--
*Pankaj Rawat*
Hi all
I have been working o the qcow2 image format ,
I theory regarding cluster size it is written that as the size of cluster
increase performance should increase.
But something surprising happen The performance is degrading as the size of
cluster increased from 64K to 1M ( during expansio
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