Tagged queueing on Dell WS610 - good idea?

[Neil Conway]

Thanks for the reply - I take it then that it is at least considered
safe?  That's reassuring.  How about changing tag-depth without a reboot
- possible?  Or should I just hack the driver to do that ;-)  Perhaps
Doug can comment...

thanks
Neil


P.C. Uiterlinden wrote:
> 
> Neil,
> 
> The best way to find out is just to try it. Use bonnie to measure the throughput
> with different queue depths. In stead of bonnie, you also could use dd to write
> and read a large file. Make sure the file is large in either case (much larger
> than your RAM).
> 
> Bonnie and dd gave comparable results in my case.
> 
> To my astonishment, it turned out that setting the queue depth larger than 2,
> severely impacted throughput with my disks.
> [SNIP]


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