Monitor NCache Using SNMP Counters
SNMP (Simple Network Management Protocol) is considered to be a standard protocol which is used as a communication medium between various network devices. NCache now provides support for monitoring of its counters using SNMP.
Configure NCache for SNMP Monitoring
You have to follow some steps before you are able to monitor NCache counters using SNMP. These steps are as follows.
- If you are using a windows machine, you have to enable SNMP on it. On Linux it is enabled by default.
- NCache service must be running
- The cache(s) which you wish to monitor must be up and running.
Configure NCache Service Config
Alachisoft.NCache.Service.dll.config config file shipped at %NCHOME%/bin/service allows you to enable and disable cache counter monitoring via SNMP through configurable tags. These tags are as follows:
<add key="NCacheServer.EnableSnmpMonitoring" value="true"/> <add key="NCacheServer.SnmpListenersInfoPort" value="8256"/> <add key="NCacheServer.EnableMetricsPublishing" value="false"/>
The value for
NCacheServer.EnableMetricsPublishing tag must be set to
true in order to monitor NCache counters using SNMP.
NCacheServer.EnableSnmpMonitoringtag allows you to enable/disable the monitoring of NCache cache counters via SNMP. On Windows this tag is set to
NCacheServer.SnmpListenersInfoPorttag allows you to configure the port at which SNMP listens to. By default the value of this is set to
8256, but you can change this value as per your requirements.
NCacheServer.EnableMetricsPublishingtag is used to enable metrics publishing to NCache service. By default, this tag is set to false. You can enable metrics publishing by setting this tag's value as true.
Make sure to restart the NCache service after you have made the respective changes to the service config files
Monitoring Using SNMP
MIB (Management Information Base) is a vital component of SNMP. It is a text file where SNMP network elements are described. The MIB can be considered as the dictionary of the SNMP langugage, where objects that are being referred in an SNMP message must be listed. Network components must be described in the MIB file otherwise they practically don't exist within the network.
NCache provides the MIB files for the counters which can be monitored with SNMP. These are shipped at %NCHOME%/bin/resources. The MIB files are as follows:
alachisoft-bridge.mibis used for monitoring the counters of the bridge. The bridge itself is used for the purposes of WAN replication. It contains components like the queue and the replicator queue etc.
alachisoft-bridgedcache.mibis used for monitoring the counters of the bridge cache. The bridge cache refers to the cache that is present inside the bridge itself.
alachisoft-cache.mibis used for monitoring the counters of the cache.
alachisoft-client.mibis used for monitoring the counters of the cache client.
alachisoft-metric-listeners.mibis the main file for SNMP monitoring. It basically informs you about all the ports where the cache, bridge, bridge cache and client counters are being published.
To monitor these cache counters with SNMP you have to load these MIB files into the tool which you are using for monitoring the network or browsing MIB files.