Re: [zfs-discuss] Log disk with all ssd pool?

2011-10-28 Thread Edward Ned Harvey
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Mark Wolek > > Still kicking around this idea and didn’t see it addressed in any of the threads > before the forum closed. > > If one made an all ssd pool, would a log/cache drive just slow yo

Re: [zfs-discuss] Log disk with all ssd pool?

2011-10-28 Thread Neil Perrin
On 10/28/11 00:54, Neil Perrin wrote: On 10/28/11 00:04, Mark Wolek wrote: Still kicking around this idea and didn’t see it addressed in any of the threads before the forum closed.    If one made an all ssd pool, would a log/cache drive just slow you d

Re: [zfs-discuss] Log disk with all ssd pool?

2011-10-28 Thread Mark Wolek
Having the log disk slowed it down a lot in your tests (when it wasn't a SSD), 30MB/s vs 7. Is this is also a 100% write / 100% sequential workload? Forcing sync? It's gotten to the point where I can buy a 120G SSD for less or the same price as a 146G SAS disk...Sure the MLC drives have limit

Re: [zfs-discuss] Log disk with all ssd pool?

2011-10-28 Thread Neil Perrin
On 10/28/11 11:21, Mark Wolek wrote: Having the log disk slowed it down a lot in your tests (when it wasn’t a SSD), 30MB/s vs 7.  Is this is also a 100% write / 100% sequential workload?  Forcing sync? 100% synchronous write. Writes are random but ZFS will write them sequent