Historical poll data reference

For a deeper understanding of historical poll data processing and storage, read the information in the following topics.

Purging of poll data
Poll data is purged using database partitioning, The raw and historical poll data tables in the NCPOLLDATA database are partitioned based on time. Partitions are added and detached at regular intervals.
Poll data aggregation in a multiple Network Manager configuration
By default, each Network Manager core server will contain an Apache Storm server to manage poll data aggregation for that Network Manager core server. If you have an installation that, due to requirements such as failover or domain scaling, has multiple Network Manager core servers, then there could be multiple Apache Storm servers running at the same time. In a multi-sever configuration of this sort there will be a mechanism in place to keep track of which Apache Storm server is running, and to enable a new Apache Storm server to take over pocessing of poll data, if necessary.
Polling performance considerations
If you have a large network, you must be aware of polling limitations in order to guarantee polling performance. There are limits on storage rate into the polling database and on the maximum number of rows that can be stored in the database.

Parent topic: Polling reference

Related tasks

Administering historical poll data