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.
