On Tue, 9 Dec 2008, Scott Carey wrote:
For what it is worth, you can roughly double to triple the iops of an Intel X-25M on pure random reads if you queue up multiple concurrent reads rather than serialize them. But it is not due to spindles, it is due to the latency of the SATA interface and the ability of the controller chip to issue reads to flash devices on different banks concurrently to some extent.
Spindles, banks. What's the difference? The fact is that you have multiple "things", and queuing up requests in the controller means that more than one at a time can be active. The X-25M is basically a RAID controller in its own right, connected to ten flash devices.
Matthew -- Don't worry! The world can't end today because it's already tomorrow in Australia. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
