Graphs for Longer than 1 Year (3, and 5 years)

[cachaca]

I did some searching on previous postings, but I could not find the answer.

What do I have to do to create/display 3 and 5 (even 10 and 15) year graphs?

I toyed around with the "RRA" and attempted to create a new archive called "3 Year", but I must confess that I did not understand the fileds required: Xfiles, Steps and Rows.

Any help would be appreciated.

Have a great day.

[jvanhambelgium]

Hi,

That is not that difficult ;

1) First check what you "default polling" is ? Do you collect avery 300 seconds (5 minutes ?)

2) At what "resolution" do you want these long-term trends ? 3 or 5 years should be fine with a resolution of '1 day average' or something

OK, now how to do this ;

- On the CACTI main menu, go to "Available RRA's"
(you'll see a few that are already there, like Weekly,Monthly...)
- Right-uppper ; press "Add"

- NAME : Give it a name, like "3YEARTREND"
- Consolidation functions, select AVERAGE (you can select the other but that will consume extra diskspace)
- X-factor ; don't touch, leave it to 0.5 like the others
- STEPS ;

Ok, assume you poll every 300 seconds (5 minutes) and this 3-year trend graph needs to be "1 day average". So ask yourself the question, howmany times does 5 minutes "fit" into 1 day ? (so 288 steps of data are aggregated into 1 item of data of you large 3-year trend)
1 day = 24 hours = 1440 minutes => 1440 / 5 = 288 steps

- ROWS ; Ask yourself , howmany of these "steps" do I need to have my full 3 year ? (so howmany data do you want to keep in the RRA) => 1 STEP = 5 minutes

3 years = 1095 days = 26280 hours = 1 567 800 minutes and we divide this by 5 (as we collect every 5 minutes) = 315360

YOUR FILE WILL BECOME PRETTY LARGE .... TRY IT!


Once you have "defined" this, you should probably check if all the configured datasources/templated will use this new RRA that you created besided your "Daily, Weekly, Monthly RRA"


Voila, that's is I think.
Does this make sense to you ?


Regards,
Jan

[MikeFr]

I thought I understood this but now I am a little confused again.

- ROWS ; Ask yourself , howmany of these "steps" do I need to have my full 3 year ? (so howmany data do you want to keep in the RRA) => 1 STEP = 5 minutes

3 years = 1095 days = 26280 hours = 1 567 800 minutes and we divide this by 5 (as we collect every 5 minutes) = 315360

Wouldnt this be for keeping 3 years worth of 5 minutes averages and not 3 years worth of one day averages?

So you have 288 steps for 3 years worth of 1 day averages.
3 years = 1095.75 days, so wouldnt you go with 1096 rows?


Mike

[jvanhambelgium]

Mike,

>Wouldnt this be for keeping 3 years worth of 5 minutes averages and >not 3 years worth of one day averages?
>So you have 288 steps for 3 years worth of 1 day averages.
>3 years = 1095.75 days, so wouldnt you go with 1096 rows?

Hmm, I guess I missed somewhere along the line ;-(

So, suppose you box is set to poll (through CRON) every 5 minutes (300 seconds)

Make a RRA with X-FACTOR = 0.5 (the default)
STEPS : (1 day = 24 hours = 1440 minutes and divide this by 5 = 288 steps)
ROWS : 3 years = 1095 days

With this you create a RRA that will have 1 datapoint for every day (aggregates 288 steps of 5 minutes each) for 1095 days long (3 years)

This should be correct...
Sorry...

Jan