Jason Fesler <[EMAIL PROTECTED]> writes: > On Wed, 15 Mar 2006, Mark Plaksin wrote: > >> Who has the most RRD files (or total data sources in RRDs)? How frequently >> are they updated? What do you use to update them? > > I can't say how many I'm doing aggregate.. but.. on a single box basis, > we're updating 2000 files with an average of 10 ds's per rrd file, fora > total of 20,000 values, once a minute, and we have reasonable query > performance for displaying data when we need it. > > On a server with 8 ide disks, raid 10, 3ware, CPU is usually not the > bottleneck (except for displays perhaps). Aveage write wait is about > 3 ms (as instrumented by our collection scripts). Linux report our > I/O utilization at 25-30%. > > We've pushed it much higher in the past, but that basically made all that > valuable data.. useless. Especially when things are on fire and you need > access to that data NOW. > > Our observation is that as we add rrd files, load goes up significantly. > Adding more DS's to existing files, much more negligable. However, adding > DS's to files, is painful at best.
Do you have a feel for why having more DSes per RRD file gives better performance? -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/rrd-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
