> From: [email protected] [mailto:opensolaris- > [email protected]] On Behalf Of Jason S > > The server consists of a Supermicro X6DHE-XG2 motherboard, 2 X 2.8ghz > xeon processors, 4 gigs of ram and 2 Supermicro SAT2MV8 controllers. I > have 14 1TB hitachi hard drives connected to the controllers. > > My initial thought was to just create a single 14 drive RaidZ2 pool, > but i have read over and over again that i should be limiting each > array to a max of 9 drives. So then i would end up with 2 X 7 drive > RaidZ arrays. > > To keep the pool size at 12TB i would have to give up my extra parity > drive going to this 2 array setup and it is concerning as i have no > room for hot spares in this system. So in my mind i am left with only > one other choice and this is going to 2XRaidZ2 pools and loosing an > additional 2 TB so i am left with a 10TB ZFS pool. > > So my big question is given that i am working with 4mb - 50gb files is > going with 14 spindles going incur a huge performance hit? I was hoping > to be able to saturate a single GigE link with this setup, but i am > concerned the single large array wont let me achieve this.
I'm not aware that there's any true limit of drives in a pool ... If you wanted you could make a 14-way mirror, or a stripe of 14 disks (though of course I'm just pointing out the fact that you could do ridiculous things if you wanted to; I'm not recommending either of those solutions.) Your decision is based entirely on what performance, what capacity, and what level of fault tolerance you're willing to accept. You could also make a 14-disk raidz3, which would have the capacity of 11 disks, and be able to survive 3 failed disks. I am not aware of any advantage to use 2x 7disk raidz pools, as compared to a 14disk raidz2. Personally I wouldn't be very comfortable with only 2 disks fault tolerance out of 14 disks. But we're not talking about data that your career depends on. We're talking about your movies, that you could presumably restore manually if you had no other choice. For streaming ISO files, you'll easily saturate the GigE with any of the configurations mentioned. _______________________________________________ opensolaris-help mailing list [email protected]
