Re: [Qemu-devel] (iSCSI-)Readcache in Qemu?

2013-02-22 Thread Kevin Wolf
Am 22.02.2013 um 08:51 hat Peter Lieven geschrieben: is there any project or plans to integrate a readcache in qemu either for iscsi or for the whole block layer? I was thinking of 2 options: a) assign (up to) a fixed amount of ram for readcaching of a VMs disk I/O. Without SG_IO this

Re: [Qemu-devel] (iSCSI-)Readcache in Qemu?

2013-02-22 Thread Stefan Hajnoczi
On Fri, Feb 22, 2013 at 08:51:48AM +0100, Peter Lieven wrote: is there any project or plans to integrate a readcache in qemu either for iscsi or for the whole block layer? I was thinking of 2 options: a) assign (up to) a fixed amount of ram for readcaching of a VMs disk I/O. Without SG_IO

Re: [Qemu-devel] (iSCSI-)Readcache in Qemu?

2013-02-22 Thread Paolo Bonzini
Il 22/02/2013 12:06, Stefan Hajnoczi ha scritto: On Fri, Feb 22, 2013 at 08:51:48AM +0100, Peter Lieven wrote: is there any project or plans to integrate a readcache in qemu either for iscsi or for the whole block layer? I was thinking of 2 options: a) assign (up to) a fixed amount of ram

Re: [Qemu-devel] (iSCSI-)Readcache in Qemu?

2013-02-22 Thread Peter Lieven
Am 22.02.2013 um 13:15 schrieb Paolo Bonzini pbonz...@redhat.com: Il 22/02/2013 12:06, Stefan Hajnoczi ha scritto: On Fri, Feb 22, 2013 at 08:51:48AM +0100, Peter Lieven wrote: is there any project or plans to integrate a readcache in qemu either for iscsi or for the whole block layer? I

Re: [Qemu-devel] (iSCSI-)Readcache in Qemu?

2013-02-22 Thread Paolo Bonzini
Il 22/02/2013 13:58, Peter Lieven ha scritto: Actually this is a great advantage as it always was a lot of hassle to prevent udev from scanning iscsi devices that popped up and maintain all that scripting around open-iscsi that was necessary. With libiscsi its much smarter. As for caching

[Qemu-devel] (iSCSI-)Readcache in Qemu?

2013-02-21 Thread Peter Lieven
Hi, is there any project or plans to integrate a readcache in qemu either for iscsi or for the whole block layer? I was thinking of 2 options: a) assign (up to) a fixed amount of ram for readcaching of a VMs disk I/O. Without SG_IO this seems to be quite easy as there are only a handful of