With the PowerMac setup they were concerned with noise so they put on massive heatsinks. This allowed them to avoid putting a fan on the heatsink. That's not the case with the xserve. Granted I'd think they'd like to make it quieter, but I don't think that's a real concern. Most server are very loud. It's all about performance.Originally posted by Laslo Panaflex
With the current size of the G5 heatsink the G5 xserve would have to be 3U. There is no way that they can make the current G5 in a 1U enclosure. But, they might be working on some sort of new way to cool the G5. . .
Originally posted by pgwalsh
With the PowerMac setup they were concerned with noise so they put on massive heatsinks. This allowed them to avoid putting a fan on the heatsink. That's not the case with the xserve. Granted I'd think they'd like to make it quieter, but I don't think that's a real concern. Most server are very loud. It's all about performance.
Yes I think they can put a G5 in a 1U enclosure... The 1 Unit rack space is a huge selling point for the Xserve. That would be something big to give up. However if they put a couple G5's in it, they might want to add a nonstick tephlon top and a graphite spatula.Originally posted by Laslo Panaflex
Yeah, I understand, but you really think they can put a G5 in a 1U enclosure with your CURRENT knowledge of the G5, I don't think so. That's does not mean they don't have lower heat producing chips from IBM or a better way to cool the things. I just think that it is more feesable for apple to make a 3U xserve, considering if it comes out soon they would have to have been working on the designs for a while and have to design for the then current hardware. Sure will will see a 1U xserve, just not anytime soon.
Originally posted by Rincewind42
I think that Apple will stick with 1U. As has been said, the massive cooling project that is the PowerMac G5 is due primarily to it being a desktop system - it can't be excessively loud. However, I don't think we'll see a G5 Xserve soon - rather I think we'll see them when 90 nm G5 become common. Add to that 4 SATA drives, each on it's own channel and hot plug-able (yes, there is enough room on the hypertransport bus for that).
If Apple did want to make the Xserve bigger, then I would expect no larger than 2U, and then I would also expect quad CPU options at least. Apple's biggest advantage on the Xserve right now is density, if they give up that advantage then there had better be a damn good reason for it.
Have a look at SGI's Tezro/Origin 350/Onyx 4. (All the same thing, basically.) It squeezes four R16000 CPU's plus disk plus PCI-X into a two-rack-unit enclosure. Apple should, at least in theory, be able to do the same thing. The 970 is big and hot, but it's not that big and hot.Originally posted by peterjhill
I would hope that apple could squeeze two G5s into 2RUs.
Okay, little tutorial here. "Grid computing" is a similar idea to cluster computing, but different in an important way. In cluster computing, you take a bunch of machines and arrange them, via hardware and software, so they can act like a single machine in some very limited ways. It usually involves some kind of task-master dolling out jobs to individual members of the cluster and receiving the results. Sometimes, though not always, clusters include special high-speed hardware to reduce inter-node latency.
I used to think so too, but then we got some hp dl360 g3 running linux without hp's special software. You can hear them through the wall of the server room, the five of them produce even more noise than the three huge cooling towers. Noise isn't that much of an issue in a server room, but they don't have to make it an issue like hp. Currently rack space isn't a problem for us, and I tend to think 1U machines are less sturdy compared to 2U. On the other hand we don't mind being able to mount it with less than four people because of the weight.Originally posted by cubist
The current Xserves use blowers, not fans. They are more than adequate for cooling G5s. As a previous poster noted, they are very, very noisy. The cooling approach taken in the PowerMac G5 is very quiet, and that's why it takes so much space.Unless Apple's gotten some flak about the Xserve's noise, they wouldn't go to 3U just for cooling considerations.