On 2013-12-10 11:22, Alexander Moisseev wrote: > By the way, you change the CF type of an RRA from AVERAGE in V3 to LAST in > V4alpha3. > I think that conversion of the CF type of RRA is very hard (or may be > impossible).
It is not possible. If you consolidate the data as AVERAGE, the LAST data is lost. You can begin consolidating new data as LAST, but the older data will show the AVERAGE data (and you'll mistakenly think it is LAST). This isn't a big issue, as AVERAGE and LAST are usually similar. It's a big problem when you want to keep MIN/MAX data and it's not available. Generally speaking, once you start using rrdtool, converting your data is a pain. Get it right when you design it, or expect that you'll have to toss it out some day. However, RRDs are small!* There is no need to throw away the AVERAGE data. We can store both AVERAGE and LAST (and MIN and MAX if we want) in the same RRD file. Most Cacti installs keep 2-4 sets of consolidated data in this way. * OK, not always small, but at least static in size. Regards, Tyler -- "No war is over until the enemy says it's over. We may think it over, we may declare it over, but in fact, the enemy gets a vote." -- Marine Gen. James Mattis ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ BackupPC-devel mailing list BackupPC-devel@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-devel Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
