30 minutes data gathering

[-charles-]

Hi there!

The problem is that I've got about 85 different graphs using same templates but different parameters. All of them are polled every 30 minutes, all other graphs are polled default 5 minutes. The deal is that they all aren't updated at the same time, but on different poller run (log shows that). It causes gaps in graphs. So my question is what causes that? And how to make them update at the same time?

OS is Debian, poller is spine, mentioned data is gathered from remote database by script I wrote.

[-charles-]

Nobody knows? I looked over whole database and couldn't find.

[gandalf]

Cacti does not yet support multiple polling intervals.
You may do so if you decide to update some rrds "manually" outside cacti and let cacti poll only those rrds that have the same polling interval
R.

[TheWitness]

Well, I beg to differ. We do support multiple poller intervals based upon the step in the data template. What we can't do it to have the same data template applied with multiple poller intervals at this point.

So, let's say you want something polled once an hour, in this case your data template will have a step of 3600, and a heartbeat of say 7200. Then, any graph instantiated with this data template, will be polled once an hour.

TheWitness

[-charles-]

Thanks for reply. Anyway i solved it in different way, because the main deal was that we didn't want to make more unnecessary load on remote server, so I wanted to poll it every half an hour instead of 5min. I wrote one more script to take out data from remote database and put in local database, wich can be polled every 5min. I changed data template intervals to default, but graphs still updates every half an hour. Is there a way to change it without removing graphs and adding them again?

[TheWitness]

Well, it all depends on the Step and Heartbeat in the RRDfile. If the step is the default of 300, then simply have your script poll the database every 5 minutes, and the graph will only change every 30. No big deal. If your Cacti system is struggling, then you would need to change the Step to 30 minutes and then delete have cacti recreate the RRDfile.

If you are using the Script Server to collect the data from the database, and if that database is on the same system as the Cacti system, you should not be having an issue though.

TheWitness