Re: [zfs-discuss] Proposed 2540 and ZFS configuration

2008-09-01 Thread Al Hopper
On Mon, Sep 1, 2008 at 5:18 PM, Mertol Ozyoney <[EMAIL PROTECTED]> wrote: > A few quick notes. > > 2540's first 12 drives are extremely fast due to the fact that they have > direct unshared connections. I do not mean that additional disks are slow, I > want to say that first 12 is extremely fast, c

Re: [zfs-discuss] Sidebar to ZFS Availability discussion

2008-09-01 Thread David Collier-Brown
Richard Elling wrote: > [what usually concerns me is that the software people spec'ing device > drivers don't seem to have much training in control systems, which is > what is being designed] Or try to develop safety-critical systems based on "best effort" instead of first developing a clear and

Re: [zfs-discuss] Proposed 2540 and ZFS configuration

2008-09-01 Thread James C. McPherson
Robert Milkowski wrote: > Hello Bob, > > Friday, August 29, 2008, 7:25:14 PM, you wrote: > > BF> On Fri, 29 Aug 2008, Kyle McDonald wrote: >>> What would one look for to decide what vdev to place each LUN? >>> >>> All mine have the same Current Load Balance value: round robin. > > BF> That is a

Re: [zfs-discuss] Proposed 2540 and ZFS configuration

2008-09-01 Thread Mertol Ozyoney
A few quick notes. 2540's first 12 drives are extremely fast due to the fact that they have direct unshared connections. I do not mean that additional disks are slow, I want to say that first 12 is extremely fast, compared to any other disk system. So although it's a little bit expansive but it

Re: [zfs-discuss] EMC - top of the table for efficiency, how well would ZFS do?

2008-09-01 Thread Mika Borner
I've read the same log entry, and was also thinking about ZFS... Pillar Data Systems is also answering to the call http://blog.pillardata.com/pillar_data_blog/2008/08/blog-i-love-a-p.html BTW: Would transparent compression be considered as cheating? :-) -- This message posted from opensolaris.or

Re: [zfs-discuss] Sidebar to ZFS Availability discussion

2008-09-01 Thread Robert Milkowski
Hello Miles, Sunday, August 31, 2008, 8:03:45 PM, you wrote: >> "dc" == David Collier-Brown <[EMAIL PROTECTED]> writes: MN> dc> one discovers latency growing without bound on disk MN> dc> saturation, MN> yeah, ZFS needs the same thing just for scrub. MN> I guess if the disks don't

Re: [zfs-discuss] Proposed 2540 and ZFS configuration

2008-09-01 Thread Robert Milkowski
Hello Bob, Friday, August 29, 2008, 7:25:14 PM, you wrote: BF> On Fri, 29 Aug 2008, Kyle McDonald wrote: >>> >> What would one look for to decide what vdev to place each LUN? >> >> All mine have the same Current Load Balance value: round robin. BF> That is a good question and I will have to rem