User story #4451
closed
Rudder agents run times should be splayed a maximum to ensure maximum scalability
Description
Currently, the agent execution schedule is to run every 5 minutes. The "splaytime" is set to 1 minute, which means that each agent will choose a random interval between -60 and +60 seconds and run at the planned time + the random interval. This means agents will actually run at any time between 10:04 and 10:06 and not at exactly 10:05 (for example).
This mechanism allows to "smooth" the load over the network (traffic) and on the server (max connections and simultaneous logs).
We should increase this to 2 minutes, to benefit from this at the maximum. Anything more than 2 minutes is not possible, because then intervals would overlap.
Updated by Jonathan CLARKE almost 11 years ago
- Status changed from 13 to 12
Actually, I had misunderstood the definition of splaytime, as described in https://cfengine.com/docs/3.5/reference-components-cfexecd.html#splaytime.
What it actually does is choose a maximum delay to pick a random delay in, that is used to wait after a specified time. So, if splay time is "2 minutes", the agent will run between 10:05 and 10:07.
Therefore, we can set splaytime up to 5 minutes, with no risk of overlap.
Updated by Jonathan CLARKE almost 11 years ago
- Status changed from 12 to Pending release
Updated by Vincent MEMBRÉ almost 11 years ago
- Category changed from System techniques to Performance and scalability
Updated by Vincent MEMBRÉ almost 11 years ago
- Status changed from Pending release to Released
This bug has been fixed in Rudder 2.10.0~beta1, which was released today.
Check out:
The release announcement: http://www.rudder-project.org/pipermail/rudder-announce/2014-March/000084.html
The full ChangeLog: http://www.rudder-project.org/foswiki/bin/view/System/Documentation:ChangeLog210
Download information: https://www.rudder-project.org/site/get-rudder/downloads/