On Mon, May 9, 2011 at 3:59 PM, David Boreham <david_list@xxxxxxxxxxx> wrote: > >> hm, if it was me, I'd write a small C program that just jumped >> directly on the device around and did random writes assuming it wasn't >> formatted. For sequential read, just flush caches and dd the device >> to /dev/null. Probably someone will suggest better tools though. > > I have a program I wrote years ago for a purpose like this. One of the > things it can > do is write to the filesystem at the same time as dirtying pages in a large > shared > or non-shared memory region. The idea was to emulate the behavior of a > database > reasonably accurately. Something like bonnie++ would probably be a good > starting > point these days though. The problem with bonnie++ is that the results aren't valid, especially the read tests. I think it refuses to even run unless you set special switches. merlin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
