c - Disk IO simulator on Linux -

c - Disk IO simulator on Linux -

i want test database performance , understand how database throughput (in terms of transactions per second) depends on disk properties io latency , variation, write queue length, etc. ideally, need simulator can mounted disk volume , has ram disk within wrapped controller allows set desired io profile in terms of latency, throughput, stability etc. wonder there such simulator linux or best way write in c?

i start looking @ loop device (losetup) , iostat. in general can mount image (from ramfs if needed) , perform io in image

c linux database performance io