On a v7000, prior to DRAID, my preference (provided I had enough disks, etc.) was to allocate MDISKs in a pool in multiples of 4s.
Allegedly, regular raid MDISKs used a single threaded task, so to take maximum advantage of the 4 core processor in a v7000, allocating MDISKs in multiples of 4 seemed like a good idea. Couldn't always do it, but if the situation presented itself..... multiples of 4 was my preference.
Question..... how does this preference change with DRAID5 or DRAID6 ? I won't have a lot of cases where I'll have enough disks to warrant allocating 4 MDISKs all with DRAID to a pool. Is the idea of "multiples of 4" thrown out with DRAID ? is DRAID single threaded ? or ?
And I get it.... even a single MDISK in a pool typically still preforms quite well for what it is.... a single MDISK..... so maybe my question is just a moot point.
Thx for any tips you can throw my way.