1st20- 60Gb disk .. is preaty much ..
2nd transfer is done via SCP that si a lil slower than any other
transfer but is more safer.
3nd It depends on READ on the host where are the VMS .. if they have
other host working .. keep in mind that the machine share the IO of that
datastore. On perfect Datastone it sould be around 6ms time to access
data on HDD .. but on live datastore it my take a lil more.
My test was starting nonpersistent image with size 50GB on a SSD drive
it took around 4Mins and was not lunch via network, just copy via scp ..
on same drive.
On 11/25/2013 4:32 AM, Gary S. Cuozzo wrote:
Hi all,
I was just moving some VM's around as a prep for some server
maintenance, via live migration. I moved 3 VM's which were all fairly
small in size of 1GB - 3GB RAM and 20GB - 60GB disk. I did the
migrations 1 at a time. I was surprised at how long the migrations
took and also that each VM was pretty much unusable during the
migration. SSH sessions timed out and websites were not able to be
accessed. A VM with 3GB RAM allocation took around 10 minutes to migrate.
Is this typical? Or do I maybe have some sort of issue on my network
or config? We run a dedicated 1000Mbps management network for this
type of thing, and all data storage access is via separate 4x 1000Mbps
bonded channels. I would have expected 3GB of RAM data to be pretty
quick. Probably < 1 min.
Are there any settings in ONE that should be tuned? I don't seem to
recall having an issue with migrations when I was just running
virt-manager/libvirt directly.
The last VM I have to move is a pretty important one and it has 24GB
RAM allocated. So I think it would be easier/quicker to just shut the
VM down, disable the host for maintenance, and redeploy it. I'm
hoping to avoid that.
Thanks for any advice,
gary
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