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Line 10: − + − * the size of the RRDs being synced − * and the sync frequency. − + − * This is primarily controlled through RRA (parameters). I will upload more notes on this as I get to know RRD's better. (Anish) − ===Sync frequency===+ − * This is controlled by the <tt>update-timeout</tt> parameter in the sugar-client configuration. − <span style="color: red;">'''Caution:''' The default RRD parameters and the sync frequency don't quite match up. The RRDs track usage statistics for around 8-10 days and the sync frequency is one hour! This needs to be tweaked appropriately while deploying in a production environment to save on bandwidth.</span>+ + + + + + + + + + + + + + + + +
Platform Team/Server Kit/Guide/Usage Statistics (view source)
Revision as of 12:51, 16 February 2012
, 12:51, 16 February 2012no edit summary
==Factors affecting network bandwidth==
==Factors affecting network bandwidth==
The two primary factors affecting the network bandwidth are:
The only factor that really affects the network bandwidth usage is the resolution at which the data is being stored. Currently, the default step-size is 60 seconds.
===RRD size===
==Factors affecting database size on the client side==
The factor that affects the database size on the client is the RRAs (Round Robin Archives) being cached on the Client XO.
The default RRA configuration on the client side reads something like
RRA:AVERAGE:0.5:1:4320
RRA:AVERAGE:0.5:5:2016
This means that there is one RRA (Round robin archive) within the DB that stores one value every minute for 4320 samples. This makes the total length of this 1 minute resolution RRA to be 4320 minutes = 3 days
The other RRA stores an average of 5 samples, for a total of 2016 samples. Thus its total duration is 5x2016 min= 10080 min= 7 days.
Thus the default duration of high resolution samples is 3 days and lower resolution samples is 7 days. Tweaking these values will affect both the database size on the client size and the network usage.
For locations with very intermittent connectivity, having bigger-duration databases might be advisable. sample RRA's could be
RRA:AVERAGE:0.5:1:43200 (30 days)
RRA:AVERAGE:0.5:5:20160 (70 days)
The above sample values will not be having any impact on network usage, since we're not increasing their resolution, frequency or adding/removing more RRA's