[CentOS] 3Ware 9550SX and latency/system responsiveness

Simon Banton wrote:
> At 17:34 +0800 14/9/07, Feizhou wrote:
>> .oh....do you have a BBU for your write cache on your 3ware board?
> 
> Not installed, but the machine's on a UPS.

Ugh. The 3ware code will not give OK then until the stuff has hit disk.

> 
> I see where you're going with larger journal idea and I'll give that a go.

Well, I do not think it will help much with a larger journal...you want 
RAM speed, not single 250GB SATA disk speed.