[rrd-users] Re: A beginners question

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Sat Jun 9 17:26:35 MEST 2001

Jason Fesler wrote:

> As to the performance..  I can *definately* say that each RRA adds that
> much more IO requirements.  I have 10 RRA's in most of my .rrd files.  I

Maybe you can trade in hard drive space for a performance gain.
This of course depends highly on the details of your setup, however
it is worth trying.

If you don't create graphs often, most of the current disk IO is wasted.
Also, if your graphs are not created with a resolution that is available
in one of the RRAs, current disk IO is wasted.

Maybe you can setup a test RRD with only one RRA.  If you use this
RRA to graph 400 days, rrdtool will need to consolidate 400 times
1440 CDPs into 400 pixels.  However, you currently are doing the same
spread out over time, even if you're not going to graph it.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
| work                                                         private |
| My employer is capable of speaking therefore I speak only for myself |
| Technical questions sent directly to me will be nuked. Use the list. | 
| http://faq.mrtg.org/                                                 |
| http://rrdtool.eu.org  --> tutorial                                  |

Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe
Help        mailto:rrd-users-request at list.ee.ethz.ch?subject=help
Archive     http://www.ee.ethz.ch/~slist/rrd-users
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi

More information about the rrd-users mailing list