Re: [zfs-discuss] VDI iops with caching

2013-01-04 Thread Geoff Nordli
On 13-01-04 02:08 PM, Richard Elling wrote: All of these IOPS <--> VDI users guidelines are wrong. The problem is that the variability of response time is too great for a HDD. The only hope we have of getting the back-of-the-napkin calculations to work is to reduce the variability by using a

Re: [zfs-discuss] VDI iops with caching

2013-01-04 Thread Richard Elling
On Jan 3, 2013, at 8:38 PM, Geoff Nordli wrote: > Thanks Richard, Happy New Year. > > On 13-01-03 09:45 AM, Richard Elling wrote: >> On Jan 2, 2013, at 8:45 PM, Geoff Nordli wrote: >> >>> I am looking at the performance numbers for the Oracle VDI admin guide. >>> >>> http://docs.oracle.com/ht

Re: [zfs-discuss] VDI iops with caching

2013-01-04 Thread Eric D. Mudama
On Thu, Jan 3 at 20:38, Geoff Nordli wrote: On Jan 2, 2013, at 8:45 PM, Geoff Nordli wrote: I am looking at the performance numbers for the Oracle VDI admin guide. http://docs.oracle.com/html/E26214_02/performance-storage.html From my calculations for 200 desktops ru

Re: [zfs-discuss] VDI iops with caching

2013-01-03 Thread Geoff Nordli
Thanks Richard, Happy New Year. On 13-01-03 09:45 AM, Richard Elling wrote: On Jan 2, 2013, at 8:45 PM, Geoff Nordli > wrote: I am looking at the performance numbers for the Oracle VDI admin guide. http://docs.oracle.com/html/E26214_02/performance-storage.html From my

Re: [zfs-discuss] VDI iops with caching

2013-01-03 Thread Richard Elling
On Jan 2, 2013, at 8:45 PM, Geoff Nordli wrote: > I am looking at the performance numbers for the Oracle VDI admin guide. > > http://docs.oracle.com/html/E26214_02/performance-storage.html > > From my calculations for 200 desktops running Windows 7 knowledge user (15 > iops) with a 30-70 read/

[zfs-discuss] VDI iops with caching

2013-01-02 Thread Geoff Nordli
I am looking at the performance numbers for the Oracle VDI admin guide. http://docs.oracle.com/html/E26214_02/performance-storage.html From my calculations for 200 desktops running Windows 7 knowledge user (15 iops) with a 30-70 read/write split it comes to 5100 iops. Using 7200 rpm disks the