On 10/06/2010 15:39, Andrey Kuzmin wrote:
On Thu, Jun 10, 2010 at 6:06 PM, Robert Milkowski <mi...@task.gda.pl <mailto:mi...@task.gda.pl>> wrote:On 21/10/2009 03:54, Bob Friesenhahn wrote: I would be interested to know how many IOPS an OS like Solaris is able to push through a single device interface. The normal driver stack is likely limited as to how many IOPS it can sustain for a given LUN since the driver stack is optimized for high latency devices like disk drives. If you are creating a driver stack, the design decisions you make when requests will be satisfied in about 12ms would be much different than if requests are satisfied in 50us. Limitations of existing software stacks are likely reasons why Sun is designing hardware with more device interfaces and more independent devices. Open Solaris 2009.06, 1KB READ I/O: # dd of=/dev/null bs=1k if=/dev/rdsk/c0t0d0p0&/dev/null is usually a poor choice for a test lie this. Just to be on the safe side, I'd rerun it with /dev/random.
That wouldn't work, would it? Please notice that I'm reading *from* an ssd and writing *to* /dev/null -- Robert Milkowski http://milek.blogspot.com
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