Re: [Users] VirtIO disk latency

2014-01-16 Thread Blaster
On Jan 9, 2014, at 3:16 AM, Markus Stockhausen stockhau...@collogia.de wrote: We see a quite a heavy latency penalty using KVM VirtIO disks in comparison to ESX. Doing one I/O onto disk inside a VM usually adds 370us of overhead in the virtualisation layer. This has been tested with

Re: [Users] VirtIO disk latency

2014-01-09 Thread Sander Grendelman
On Thu, Jan 9, 2014 at 10:16 AM, Markus Stockhausen stockhau...@collogia.de wrote: ... - access NFS inside the hypervisor - 12.000 I/Os per second - or 83us latency - access DISK inside ESX VM that resides on NFS - 8000 I/Os per second - or 125us latency - access DISK inside OVirt VM that

Re: [Users] VirtIO disk latency

2014-01-09 Thread Markus Stockhausen
Von: sander.grendel...@gmail.com Gesendet: Donnerstag, 9. Januar 2014 10:32 An: Markus Stockhausen Cc: users@ovirt.org Betreff: Re: [Users] VirtIO disk latency On Thu, Jan 9, 2014 at 10:16 AM, Markus Stockhausen stockhau...@collogia.de wrote: ... - access NFS inside the hypervisor