On Fri, Feb 14, 2003 at 11:19:04AM -0500, George Georgalis wrote: > On Fri, Feb 14, 2003 at 10:15:16AM -0500, Matt Zimmerman wrote: > >Of course you can, as long as you set up your RRDs at the start to hold all > >of the data that you will want. RRDs do not expand once they are created, > >so once it wraps and starts to overwrite old data, it is lost. > > RRDs are designed not to grow, hence the "Round Robin" they are not > intended to archive historical data, but you could always save a png for > the prior month at the first day of the month and compare the pictures > later...
You can also snapshot the RRDs so that you preserve all data (and easily plot data from multiple RRDs on the same graph), but this is not a natural fit for rrdtool. -- - mdz
