Hi David, A question about the default behavior.
Are sent/received bytes/sec datasets for all interfaces on all devices sent to the database, or just datasets for interfaces that are visible on a map? Dennis On 2012-05-03, at 6:46 AM, dschnur wrote: > 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] > ____________________________________________________________________ List archives: http://www.mail-archive.com/intermapper-talk%40list.dartware.com/ To unsubscribe: send email to: [email protected]
