Re: [zfs-discuss] General recommendations on raidz groups of different sizes

2007-07-23 Thread Richard Elling
Richard Elling wrote: Haudy Kazemi wrote: How would one calculate system reliability estimates here? One is a RAIDZ set of 6 disks, the other a set of 8. The reliability of each RAIDZ set by itself isn't too hard to calculate, but put together, especially since they're different sizes, I

Re: [zfs-discuss] General recommendations on raidz groups of different sizes

2007-07-22 Thread Richard Elling
Haudy Kazemi wrote: How would one calculate system reliability estimates here? One is a RAIDZ set of 6 disks, the other a set of 8. The reliability of each RAIDZ set by itself isn't too hard to calculate, but put together, especially since they're different sizes, I don't know. We just

Re: [zfs-discuss] General recommendations on raidz groups of different sizes

2007-07-19 Thread Richard Elling
After a cup of French coffee, I feel strong enough to recommend :-) David Smith wrote: What are your thoughts or recommendations on having a zpool made up of raidz groups of different sizes? Are there going to be performance issues? It is more complicated and, in general, more complicated is

Re: [zfs-discuss] General recommendations on raidz groups of different sizes

2007-07-19 Thread Matthew Ahrens
David Smith wrote: What are your thoughts or recommendations on having a zpool made up of raidz groups of different sizes? Are there going to be performance issues? It should be fine. Under some circumstances the performance could be similar to a pool with all raidz groups of the smallest

Re: [zfs-discuss] General recommendations on raidz groups of different sizes

2007-07-19 Thread David W. Smith
Matt, Thank you for your reply. I like to keep the raidz groups with the same number of disks but it is not always that easily to have the numbers work out way. David On Thu, 2007-07-19 at 14:49 -0700, Matthew Ahrens wrote: David Smith wrote: What are your thoughts or recommendations on

[zfs-discuss] General recommendations on raidz groups of different sizes

2007-07-18 Thread David Smith
What are your thoughts or recommendations on having a zpool made up of raidz groups of different sizes? Are there going to be performance issues? For example: pool: testpool1 state: ONLINE scrub: none requested config: NAMESTATE READ