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Overview
Opmantek gets many questions on how to scale NMIS8 for very large networks. There are many factors impacting polling performance and the upper limits of polling is really only limited by the number of processor cores, available memory and disk IO performance. We have customers managing 10's of 1000's of nodes using NMIS.
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If you hare having problems scaling your NMIS installation, you could contact Opmantek for assistance.
Using JSON for NMIS Database
To optimise how NMIS files are saved, you can use the JSON database, this will require NMIS 8.4.8g or greater. The following needs to be run on every master and poller server in an NMIS cluster and this should be co-ordinated to run very close together.
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/usr/local/nmis8/admin/convert_nmis_db.pl |
This script will stop NMIS polling, convert the database files, update the NMIS configuration to use the new database format, then start the polling again.