> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Kyle McDonald > > I've been thinking lately that I'm not sure I like the root pool being > unprotected, but I can't afford to give up another drive bay.
I'm guessing you won't be able to use the USB thumbs as a boot device. But that's just a guess. However, I see nothing wrong with mirroring your primary boot device to the USB. At least in this case, if the OS drive fails, your system doesn't crash. You're able to swap the OS drive and restore your OS mirror. > That led me to wonder whether partitioning out 8 or 12 GB on a 32GB > thumb drive would be beneficial as an slog?? I think the only way to find out is to measure it. I do have an educated guess though. I don't think, even the fastest USB flash drives are able to work quickly, with significantly low latency. Based on measurements I made years ago, so again I emphasize, only way to find out is to test it. One thing you could check, which does get you a lot of mileage for "free" is: Make sure your HBA has a BBU, and enable the WriteBack. In my measurements, this gains about 75% of the benefit that log devices would give you. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
