Re: [rrd-users] Questions about different RRA`s

[David Schulz]

Yes ive seen Cacti, its nice. The whole idea for me though is to  
actually learn how the rrd thing works, so i am not limited to a  
front-end.

Thanks a lot,
David



On Apr 5, 2007, at 10:08 PM, Ryan Steele wrote:

 David,

 Just my two cents - check out Cacti.  It comes with lots of pre- 
 loaded RRD/RRA definitions, among them being the process counts.   
 Of all the frontends to RRDTool, I prefer Cacti over Munin,  
 Cricket, MRTG, and the like.  The documentation is a bit less than  
 you'd like, but once you get your head around it it's really a  
 dream to work with.

 Best,
 Ryan Steele

 David Schulz wrote:
 Hello,

 since a while i am digging around the Net to become more clear  
 about  rrdtool, but i am not making much progress.

 My Goal is to graph the Number of Processes on my Server, for the   
 last  hour, day, week, month and year. In the beginning i just  
 made  one big Archive, using

 Can someone show me how to best create one such .rrd with  
 multiple  RRA`s, explain to me the calculations you made to decide  
 on the  values for the RRA`s? I tried multiple combinations, one -

 rrdtool create process_count.rrd --step 60 DS:pc:GAUGE:120:0:U   
 RRA:AVERAGE:0.5:1:525960, which is supposed to take one value  
 every  60 seconds, for one year,

 but it appears it is better to split the different required times   
 into different RRA`s. I have no idea how to calculate this though.  
 My  main Problem is to determine the exact Values for the  
 individual  RRA:AVERAGE:0.5:?:?. I have read that for example this

 RRA:AVERAGE:0.5:1:60 should be one hour (1*60*60= 3600 seconds),  
 and  RRA:AVERAGE:0.5:60:24 should be 24 hours, but how about a  
 week or a  month for example? Why RRA:AVERAGE:0.5:60:24, and not  
 RRA:AVERAGE: 0.5:24:60, both should equal a week, right?


 I really need a push in the right direction here.
 Thanks a lot for any Explanation,
 David

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 -- 
 Ryan Steele Systems  
 AdministratorAgoraNet, Inc.



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[rrd-users] Questions about different RRA`s

[David Schulz]

Hello,

since a while i am digging around the Net to become more clear about  
rrdtool, but i am not making much progress.

My Goal is to graph the Number of Processes on my Server, for the  
last  hour, day, week, month and year. In the beginning i just made  
one big Archive, using

Can someone show me how to best create one such .rrd with multiple  
RRA`s, explain to me the calculations you made to decide on the  
values for the RRA`s? I tried multiple combinations, one -

rrdtool create process_count.rrd --step 60 DS:pc:GAUGE:120:0:U  
RRA:AVERAGE:0.5:1:525960, which is supposed to take one value every  
60 seconds, for one year,

but it appears it is better to split the different required times  
into different RRA`s. I have no idea how to calculate this though. My  
main Problem is to determine the exact Values for the individual  
RRA:AVERAGE:0.5:?:?. I have read that for example this

RRA:AVERAGE:0.5:1:60 should be one hour (1*60*60= 3600 seconds), and  
RRA:AVERAGE:0.5:60:24 should be 24 hours, but how about a week or a  
month for example? Why RRA:AVERAGE:0.5:60:24, and not RRA:AVERAGE: 
0.5:24:60, both should equal a week, right?


I really need a push in the right direction here.
Thanks a lot for any Explanation,
David

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