![[Erlang Systems]](min_head.gif)
The measurement handler Mesh is an Operation and Maintenance management application that firstly, provides support to applications and managers for creation and control of measurement types and objects, and secondly, allows control of the associated logs.
Mesh is designed to be a distributed global application, which means that although it may only be running at one node at a time, with the other nodes as standby nodes, clients may access the Mesh functionality from any node.
The Mesh API can be used to make management protocol specific interfaces to Mesh, for example SNMP, CORBA, or HTTP interfaces. Currently, an SNMP interface is included in the application; others may follow.
Mesh uses the Mnesia DBMS to store data. This means that Mnesia
must be running on all nodes where Mesh may run, and that the
tables Mesh uses must be created and configured correctly. Mesh
provides a function that should be called to create
tables, and to define replicas for Mnesia. This function is
called create_tables, and takes one parameter, a list of
nodes. The Mnesia tables will be replicated on these
nodes; some on disk, and some in RAM. It is important that
these nodes are the same as those where Mesh will run.
Mesh also uses EVA functionality to send and log generated events and alarms. The logs can be examined by a manager at a later time, however, the configuration and start of EVA is left to the client application programmer (please see the EVA User's Guide and manual pages).
Commonly used statistical functions may be found in the module mesh_lib.
The following configuration parameters are defined for the Mesh application (for more information about configuration parameters see application(3)):
snmp_adapted = true | false <optional>false, meaning that the adaptation
is not started.
mesh(3), mesh_lib(3), eva(3), eva_sup(3)