PRTG Cluster: What happens to historical data when the a cluster node goes offline for some time?

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We use netflow and SNMP metrics for monthly billing reports. If my master node drops offline for 2 days (or 2 hours or whatever time frame) and then comes back online, will there be a gap in the data for that time it was offline or will it update it's database with data collected by one of the other nodes?

If not how do we generate accurate billing reports without gaps in the records? What if both proves in a 2-way cluster are down for different time periods? How to we avoid a reporting gap then?

cluster-setup clustering historic-data prtg8beta storage

Created on Aug 11, 2010 11:28:11 AM by Dirk Paessler [Paessler Support] (9,613) ●3 ●3

Last change on Aug 11, 2010 1:11:59 PM by Daniel Zobel [Paessler Support] (21,383) ●3 ●3



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Each node manages its own storage for historic data. If a node goes offline the node will have a gap in its data (and in graphs and tables).

When you run the "historic data" function or if you create a report for a sensor you have the choice to work only with the data of "one node" or "all nodes". When "all nodes" is selected you will see data tables with the results of all sensors.

The current version does not yet have a method to combine data from several nodes into one dataset (by filling in data of other nodes into gaps of the primary node) (but that should come soon). Currently you would have to look at the tables yourself and apply corrections manually.

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Created on Aug 11, 2010 11:34:18 AM by Dirk Paessler [Paessler Support] (9,613) ●3 ●3

Last change on Aug 23, 2010 12:48:46 PM by Daniel Zobel [Paessler Support] (21,383) ●3 ●3



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I had exactly the same question. The main reason for using the failover scenario would be so there are no gaps in the reports (which makes you lose money or look unprofessional)

Im a little sad to read this as its the main reason we wanted to deploy the failover scenario. Just like the OP posted, to have the billing reports without downtime holes. Everyone needs to reboot Win Servers, after updates, that leaves minute gaps in the reports. I hope v8 will be able to combine the reports.

Created on Aug 28, 2010 7:26:12 PM by Volker Weiterer (0) ●1



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