On Fri, Oct 22, 2010 at 10:40 PM, Haudy Kazemi <kaze0...@umn.edu> wrote:
> > >> One thing suspicious is that we notice a slow down of one pool when the >> other is under load. How can that be? >> >> Ian >> >> > A network switch that is being maxed out? Some switches cannot switch at > rated line speed on all their ports all at the same time. Their internal > buses simply don't have the bandwidth needed for that. Maybe you are > running into that limit? (I know you mentioned bypassing the switch > completely in some other tests and not noticing any difference.) > > Any other hardware in common? > > > There's almost 0 chance a switch is being overrun by a single gigE connection. The worst switch I've seen is roughly 8:1 oversubscribed. You'd have to be maxing out many, many ports for a switch to be a problem. Likely you don't have enough ram or CPU in the box. --Tim
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