> 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.
Interesting product; probably out of my price range, though. It used to be they would sell products that took normal DIMMS, battery back them, and would output a normal sata connector. The last time I saw such a device it only supported non-ecc ddr2, and thus was completely useless to me. > 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. yeah, makes sense. _______________________________________________ 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/
