[rrd-users] Re: Who has the most RRD files (or data sources)?
happy at usg.edu
Mon Mar 20 18:34:26 MET 2006
Jason Fesler <jfesler at gigo.com> writes:
>> Do you have a feel for why having more DSes per RRD file gives better
> To be clear: Why, for a given number of DS's, it is cheaper to lump them
> together, instead of a DS per file... that would be due to the number of
> seeks per update involved, where I/O is mostly defined by how many RRA's
> you use in the rrd - not the number of DS's.
Does this boil down to meaning that the parts of a single RRD file are
physically close to each other on disk? And that multiple RRD files are
further apart? I can see how that would make things a bit faster or slower
but it doesn't seem like it would make the huge difference that some people
seem to see when they put multiple RRAs into one RRD.
Am I just clueless? :) Or does it make sense to you that the difference is
Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe
Help mailto:rrd-users-request at list.ee.ethz.ch?subject=help
More information about the rrd-users