With the database enabled, the key factor becomes the number of datasets that you're exporting. By default that's response time and short-term packet loss for all devices, plus sent/received bytes/sec for all interfaces. So if each of your devices had 16 interfaces, that would be 2000 * 2 + 2000 * 16 * 2, for a total of 68000 datasets.
For architectural reasons, performance degrades heavily with more than 20-40k datasets. We're working to increase this limit, but for now the best performance investment is reducing that number. A couple of hours spent narrowing the datasets to just those that you *really* want to report on has a greater impact than a million dollars of hardware. Generally, though, the software is I/O-bound, particularly when using the database. And with a single machine, the bottleneck becomes contention rather than bandwidth. If physical space isn't a concern, it's therefore much more effective to get three lower-powered systems, running IM, IMDC and Flows separately, than a single high-powered one. SAS doesn't help nearly as much as avoiding having three processes constantly fighting over the position of the disk head. My ideal setup on a budget would be three machines with the cheapest consumer-grade Core i7s and 4/8/8 GB of RAM for the IM, IMDC and Flows machines, respectively. If I was still under-budget, I'd get an SSD for the IM machine and SATA RAID0 for the IMDC & Flows machines, with some money set aside to cover the fact that SSDs and consumer SATA drives tend to fail a lot faster than server-grade SAS. But I'd sacrifice just about anything if the money could instead be spent on having someone figure out exactly which datasets to export. David ----------- David Schnur Dartware, LLC -------------------- m2f -------------------- Read this topic online here: http://forums.intermapper.com/viewtopic.php?p=4077#4077 ____________________________________________________________________ List archives: http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ To unsubscribe: send email to: [email protected]
