On 03/05/2013 11:03 AM, Balamurugan V G wrote: > Hi, > > I have a Folsom 2012.2 3 nodes setup like the one specified at > https://github.com/mseknibilel/OpenStack-Folsom-Install-guide/blob/master/OpenStack_Folsom_Install_Guide_WebVersion.rst. > Each node has a 1Tb hard disk with no raid. > > Be it the image creation or the Instance creation, takes a long time(factor > of the disk size of the image), about 15mins for a 20gb image. I can > understand the slow image creation due to the http transfer of the file from > a seperate web server hosting my images to the controller node. But even the > instance creation takes that much or even a bit longer. I see that the image > is copied from the Controller to Compute node and multiple copies are make in > the compute node. So all this takes long an dis proportional to the image > size. Is there any way to speed up this process? Is a SAN based backend the > only way to go?
It sounds like you're using raw images throughout? You might consider using qcow2 images in glance. Then you can avoid the conversion to raw in the libvirt base directory by setting force_raw_images=False in nova.conf That will avoid some of the initial caching penalty. Ensuring that you have use_cow_images=True set, with use CoW images for the instances and improve instance startup latency. Details of the operations and tradeoffs involved are at: http://www.pixelbeat.org/docs/openstack_libvirt_images/ thanks, Pádraig. _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
