Re: [Users] EL5 support for VirtIO SCSI?

2013-11-14 Thread Stefan Hajnoczi
On Thu, Nov 14, 2013 at 02:39:33AM -0500, Ayal Baron wrote: - Original Message - Hello Itamar. The specific use case is a particular propriety filesystem that needs to see a scsi device. It will do scsi inquiry conmmands to verify suitability. In talking to the devs - of

[ovirt-users] Re: [Qemu-block] Re: Debugging ceph access

2018-06-04 Thread Stefan Hajnoczi
On Thu, May 31, 2018 at 11:02:01PM +0300, Nir Soffer wrote: > On Thu, May 31, 2018 at 1:55 AM Bernhard Dick wrote: > > > Hi, > > > > I found the reason for my timeout problems: It is the version of librbd1 > > (which is 0.94.5) in conjunction with my CEPH test-environment which is > > running

[ovirt-users] Re: [OT] Major and minor numbers assigned to /dev/vdx virtio devices

2020-07-14 Thread Stefan Hajnoczi
On Mon, Jul 13, 2020 at 09:53:31PM +0300, Nir Soffer wrote: > On Wed, Jul 1, 2020 at 5:55 PM Gianluca Cecchi > wrote: > > > > Hello, > > isn't there an official major/minor numbering scheme for virtio disks? > > Sometimes I see 251 major or 252 or so... what is the udev assignment logic? > >

[ovirt-users] Re: very very bad iscsi performance

2020-07-24 Thread Stefan Hajnoczi
On Thu, Jul 23, 2020 at 07:25:14AM -0700, Philip Brown wrote: > Usually in that kind of situation, if you dont turn on sync-to-disk on every > write, you get benchmarks that are artificially HIGH. > Forcing O_DIRECT slows throughput down. > Dont you think the results are bad enough already? :-}

[ovirt-users] Re: [BULK] Re: very very bad iscsi performance

2020-07-23 Thread Stefan Hajnoczi
On Tue, Jul 21, 2020 at 07:14:53AM -0700, Philip Brown wrote: > Thank you for the analysis. I have some further comments: > > First off, filebench pre-writes the files before doing oltp benchmarks, so I > dont think the thin provisioning is at play here. > I will double check this, but if you