On Tue, 29 Jul 2008, Ceri Davies wrote: > > I worry about what having one big pool would do to the likelihood of > losing all of the data on the box though; I think splitting it up gives > me a better chance of surviving multiple device failures, plus lower > impact if I'm wrong :)
The pool is no stronger than its weakest vdev. Raidz2 is quite strong. Load sharing across vdevs will definitely improve performance. If all of the vdevs in a load shared pool are the same configuration, then the probability of losing the entire pool due to disk failure is the probability of losing one vdev multiplied by the number of vdevs. Using a vdev as strong as raidz2 allows its strength to be divided many times without appreciably changing the strength of the pool. The scenario is like purchasing lottery tickets. If you purchase 10 tickets then you are 10X more likely to win the lottery but are still highly unlikely to win. The biggest concerns should be software bugs and human error. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
