On Mon, Apr 15, 2013 at 5:00 AM, Edward Ned Harvey (openindiana) < openindi...@nedharvey.com> wrote:
> > So I'm just assuming you're going to build a pool out of SSD's, mirrored, > perhaps even 3-way mirrors. No cache/log devices. All the ram you can fit > into the system. What would be the logic behind mirrored SSD arrays? With spinning platters the mirrors improve performance by allowing the fastest of the mirrors to respond to a particular command to be the one that defines throughput. With SSDs, they all should respond in basically the same time. There is no latency due to head movement or waiting for the proper spot on the disc to rotate under the heads. The improvement in read performance seen in mirrored spinning platters should not be present with SSDs. Admittedly, this is from a purely theoretical perspective. I've never assembled an SSD array to compare mirrored vs RAID-Zx performance. I'm curious if you're aware of something I'm overlooking. _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
