I would remark that allocation_classes (which is in 0.8, but not what Ubuntu ships yet AFAIK) would maybe be a better use for your fast flash storage. Of cours

I would remark that allocation_classes (which is in 0.8, but not what Ubuntu ships yet AFAIK) would maybe be a better use for your fast flash storage. Of course, if the L2ARC dies, you shrug, while if allocation_classes vdevs die, your pool is gone, so there's that tradeoff to be aware of too.