On Fri, 1 Feb 2008 22:45:30 -0500 "Douglas A. Tutty" <[EMAIL PROTECTED]> wrote:
> Sure. It would make sense if the hardware could keep up with two > NICs going full-out, so it depends on the network speed > (10/100/1000), the speed and quality of the NICs, and the power of > the computer. Either way, every packet has to go through the > kernel and the firewall code. I don't know which is faster. It > takes a monster of a box to keep a GB ethernet saturated, yet alone > 2. > > Look at it this way: > > Lets say we're dealing with a 100 MB/s ethernet. Lets say that all > the boxes on the network are all capable of saturating their 100 > MB/s ethernet. If all the NICs all try to talk at once, as long as > they are talking in pairs, then the switch should handle it. In > this case, having two NICs in your box makes sense because, being > two virtual boxes, it is conceivable that two different client > boxes will want to talk to the server box at full speed, as long as > the server box can keep 2 100 MB/s NICs well fed while doing the > serving. Also, as long as the switch back-plane has the > throughput. > > Remember, a second NIC will mean twice the hardware to be > interrupting the CPU. > > I would rather spend the money on one good NIC than two cheaper > ones. > > Doug. I think that I understand what you're saying. However, what's the difference? If the machine is capable of handling 15 VirtualHosts with 1 nic and 1 IP number, why can it not handle 15 VirtualHosts with 2 nics and 2 IP numbers? What am I not understanding? Scenario #1: domainA and domainB are being hosted on 1 machine with 1 nic. Out of need, different IP numbers are needed, so eth0 is being aliased, creating eth0:1. Scenario #2 domainA and domainB are being hosted on 1 machine with 2 nic. Out of need, different IP numbers are needed, so nic#0 is eth0 and nic#1 is eth1. The only difference I can see is that, in essence, Scenario #1 is possibly "throttling" what reaches the CPU by virtue of what can get through the nic. -- Raquel ============================================================ The arc of the moral universe is long, but it bends towards justice. --Martin Luther King, Jr. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
