Hi, I don't know if it's already been discussed here, but while thinking about using the OCZ Vertex 2 Pro SSD (which according to spec page has supercaps built in) as a shared slog and L2ARC device it stroke me that this might not be a such a good idea. Because this SSD is MLC based, write cycles are an issue here, though I can't find any number in their spec. Why do I think it might be a bad idea: L2ARC is quite static in comparison with ZIL and L2ARC takes all the place it can get. But if 90% of the device are nearly statically allocated, the devices possibilities for wear-leveling are very restricted. If the ZIL is heavily used, the same 10% of the device get written over and over again, reducing the life span by 90%.
Is there some fundamental flaw in this line of thought? Thanks, Arne _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
