Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-06 Thread Mark Lehrer
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? No, but if you have multiple compute nodes you will want to have them all share /var/lib/nova/instances on a fast

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-06 Thread Pádraig Brady
On 03/06/2013 02:46 PM, Mark Lehrer wrote: 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? No, but if you have multiple compute nodes you will want to have them

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-06 Thread Mark Lehrer
The change I made that helped the most was to disable NBD. You have Was that to disable injection at startup? No, NBD is just slow and unreliable for some reason. Disabling it made my users happy. I haven't had time to find out why NBD is so horrible. Eventually I would like to see

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-06 Thread Balamurugan V G
Yes it makes sense to have /var/lib/glance/images and /var/lib/nova/instances/_base on the same network file system. But Quantum network node being a bottle neck today, would the benefits be nullified by a choked network? Regards, Balu On Wed, Mar 6, 2013 at 9:42 PM, Mark Lehrer m...@tpsit.com

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-06 Thread Pádraig Brady
On 03/06/2013 04:12 PM, Mark Lehrer wrote: The change I made that helped the most was to disable NBD. You have Was that to disable injection at startup? No, NBD is just slow and unreliable for some reason. Disabling it made my users happy. I haven't had time to find out why NBD is so

[Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-05 Thread Balamurugan V G
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

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-05 Thread Pádraig Brady
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

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-05 Thread Balamurugan V G
Thanks for the response. I have the images as .img in the web server which is external to OpenStack nodes. But while I create the image in Horizon, I set the format to QCOW2. So once th image is created it shows as QCOW2. Then the instance is launched from this QCOW2 image. Do you mean that I

Re: [Openstack] [OpenStack] How to speed up the instance launch time?

2013-03-05 Thread Staicu Gabriel
. Regards, Gabriel From: Pádraig Brady p...@draigbrady.com To: Balamurugan V G balamuruga...@gmail.com Cc: openstack@lists.launchpad.net Sent: Tuesday, March 5, 2013 1:20 PM Subject: Re: [Openstack] [OpenStack] How to speed up the instance launch time