On Sun, Sep 18, 2011 at 5:47 PM, Luke S. Crawford <l...@prgmr.com> wrote: > But not the ZIL, right? or is there a way to mirror SSDs for a ZIL?
You can mirror the ZIL, you actually can't mirror the L2ARC. The reason I said L2ARC and not ZIL for MLC consumer SSDs has to do with size, performance, and price. The maximum size for the ZIL is about 1/2 RAM, effective size is even smaller, it needs enough to store about 10 seconds worth of writes. It also needs to have very fast writes. Something like the STEC ZeusRAM (a flash-backed RAM drive) or a small SLC SSD would be ideal. The L2ARC is an extension of RAM for read cache. Spending $3000 on a 100GB SLC SSD isn't a great deal, when you can spend $3000 on 128GB of RAM that would be faster and do the same thing. On the other hand spending $500 on 300GB of MLC SSD sounds pretty good. -Anton _______________________________________________ Tech mailing list Tech@lists.lopsa.org https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
