Today Pradeep Hodigere wrote: > > Hi, > > Can RRD be used by tools that need to read data off > the RRD files at 2 second intervals? The number of > DS's are about 40 and there are 5 RRA's. Writing into > the RRD files seems to be happening realtime but > reading off of it by the display tools seems to take > longer than 7 seconds. I'm not sure on the cause of > the reading delay. > > Please let me know if RRD can be used when it comes > to real-time monitoring.
Hi pradeep, reading is much more costly than writing, because of the internal structure of rrd files, writing to them is as fast as it gets, I doubt that you can devise a file structure which will do it much more efficiently than rrd. But for reading, all the data has to be read, and a graph has to be generated. This takes time ... if you wanted todo a realtime scrolling graph it would make sense to only read bits of the data a time and graph them and push the graph along as you go ... rrdtool graph can not do this, but you could certainly implement it tobi > > Thanks, > pradeep > > __________________________________________________ > Do You Yahoo!? > Yahoo! Health - your guide to health and wellness > http://health.yahoo.com > > -- > Unsubscribe mailto:[EMAIL PROTECTED] > Help mailto:[EMAIL PROTECTED] > Archive http://www.ee.ethz.ch/~slist/rrd-users > WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi > > -- ______ __ _ /_ __/_ / / (_) Oetiker, ETZ J97, ETH, 8092 Zurich, Switzerland / // _ \/ _ \/ / phoneto:+41(0)1-632-5286 faxto:+41(0)1-632-1517 /_/ \.__/_.__/_/ [EMAIL PROTECTED] http://google.com/search?q=tobi -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
