What is the purpose of doing this qemu-img convert -f qcow2 -O qcow2 -s
KVM is using qcow2 this is the bit that is slowing this whole process On Wed, Jun 4, 2014 at 5:30 PM, Ivan Rodriguez <ivan...@gmail.com> wrote: > You are absolutely right > > root 12348 2284 0 14:45 ? 00:00:00 bash > /usr/share/cloudstack-common/scripts/storage/qcow2/managesnapshot.sh -b > /mnt/5ffe8656-f987-3fcb-b71d-7dd1ed19e839/6ea271b1-2f95-4421-bca7-65b099c0577f > -n 8b50e8dc-16a7-4948-99c0-e6d1751d6db5 -p > /mnt/0b383db5-9f31-3760-873d-9ac05f349860/snapshots/3/144 -t > 8b50e8dc-16a7-4948-99c0-e6d1751d6db5 > root 12358 12348 2 14:45 ? 00:03:39 qemu-img convert -f qcow2 > -O qcow2 -s 8b50e8dc-16a7-4948-99c0-e6d1751d6db5 > /mnt/5ffe8656-f987-3fcb-b71d-7dd1ed19e839/6ea271b1-2f95-4421-bca7-65b099c0577f > /mnt/0b383db5-9f31-3760-873d-9ac05f349860/snapshots/3/144/8b50e8dc-16a7-4948-99c0-e6d1751d6db5 > > > Cheers > > > > On Wed, Jun 4, 2014 at 5:27 PM, Ivan Rodriguez <ivan...@gmail.com> wrote: > >> Hi Geoff, >> >> What if the VM is stopped and not running anywhere ? >> which is my case. >> >> We have 10 GB LACP and jumbo frames. >> >> Cheers >> >> >> >> On Wed, Jun 4, 2014 at 5:02 PM, Geoff Higginbottom < >> geoff.higginbot...@shapeblue.com> wrote: >> >>> Ivan, >>> >>> The Host actually copies the image to Sec Storage, if this is very slow >>> have you considered dedicating some NICs and configuring the CloudStack >>> 'Storage' network and enabling Jumbo Frames etc. >>> >>> Regards >>> >>> Geoff Higginbottom >>> CTO / Cloud Architect >>> >>> D: +44 20 3603 0542<tel:+442036030542> | S: +44 20 3603 0540<tel: >>> +442036030540> | M: +447968161581<tel:+447968161581> >>> >>> geoff.higginbot...@shapeblue.com<mailto:geoff.higginbot...@shapeblue.com> >>> | www.shapeblue.com<htp://www.shapeblue.com/> | Twitter:@cloudstackguru< >>> https://twitter.com/#!/cloudstackguru> >>> >>> ShapeBlue Ltd, 53 Chandos Place, Covent Garden, London, WC2N >>> 4HS<x-apple-data-detectors://5> >>> >>> >>> On 4 Jun 2014, at 07:19, "Ivan Rodriguez" <ivan...@gmail.com<mailto: >>> ivan...@gmail.com>> wrote: >>> >>> Dear Cloudstack users, >>> >>> Can someone explain me roughly the process of creating an snapshot in >>> KVM ? >>> >>> The process takes a very long time, the speed at what the qcow2 file is >>> copied from primary to secondary storage is extremely slow, on the >>> storage >>> level >>> I can see is around 4 Mbps but I know our primary storage and secondary >>> can >>> dump data faster than that >>> >>> So far this is what I know >>> >>> Step >>> 1.- Pause the VM in the host >>> 2.- Create the snapshot of the qcow2 files using qemu-img >>> 3.- Backup the image into secondary storage >>> >>> So my question is who is actually copying that file over to secondary >>> storage ? >>> I've checked the secondary storage vm and it doesn't look like its >>> playing >>> any role during this process. >>> >>> Thanks in advance >>> Find out more about ShapeBlue and our range of CloudStack related >>> services >>> >>> IaaS Cloud Design & Build< >>> http://shapeblue.com/iaas-cloud-design-and-build//> >>> CSForge - rapid IaaS deployment framework<http://shapeblue.com/csforge/> >>> CloudStack Consulting<http://shapeblue.com/cloudstack-consultancy/> >>> CloudStack Infrastructure Support< >>> http://shapeblue.com/cloudstack-infrastructure-support/> >>> CloudStack Bootcamp Training Courses< >>> http://shapeblue.com/cloudstack-training/> >>> >>> This email and any attachments to it may be confidential and are >>> intended solely for the use of the individual to whom it is addressed. Any >>> views or opinions expressed are solely those of the author and do not >>> necessarily represent those of Shape Blue Ltd or related companies. If you >>> are not the intended recipient of this email, you must neither take any >>> action based upon its contents, nor copy or show it to anyone. Please >>> contact the sender if you believe you have received this email in error. >>> Shape Blue Ltd is a company incorporated in England & Wales. ShapeBlue >>> Services India LLP is a company incorporated in India and is operated under >>> license from Shape Blue Ltd. Shape Blue Brasil Consultoria Ltda is a >>> company incorporated in Brasil and is operated under license from Shape >>> Blue Ltd. ShapeBlue is a registered trademark. >>> >> >> >
