On Wed, Jun 1, 2011 at 7:06 AM, Bill Sommerfeld <sommerf...@hamachi.org> wrote: > On 05/31/11 09:01, Anonymous wrote: >> Hi. I have a development system on Intel commodity hardware with a 500G ZFS >> root mirror. I have another 500G drive same as the other two. Is there any >> way to use this disk to good advantage in this box? I don't think I need any >> more redundancy, I would like to increase performance if possible. I have >> only one SATA port left so I can only use 3 drives total unless I buy a PCI >> card. Would you please advise me. Many thanks. > > I'd use the extra SATA port for an ssd, and use that ssd for some > combination of boot/root, ZIL, and L2ARC. > > I have a couple systems in this configuration now and have been quite > happy with the config. While slicing an ssd and using one slice for > root, one slice for zil, and one slice for l2arc isn't optimal from a > performance standpoint and won't scale up to a larger configuration, it > is a noticeable improvement from a 2-disk mirror. > > I used an 80G intel X25-M, with 1G for zil, with the rest split roughly > 50:50 between root pool and l2arc for the data pool.
Does anyone have a benchmark or history data on how reliable an SSD is nowadays? Cheap-ish sandforce-based MLC SSDs usually say they support 1 million write cycles, and that they have some kind of wear-leveling. How does this translates when it's used as L2ARC? Can we expect something like one year or three years lifetime when the pool is relatively busy? -- Fajar _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
