Mnesia

User's Guide

Version 4.15.3

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- Reference Manual
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### Chapters

- Introduction
  - Top of chapter
  - Scope
  - Prerequisites
- Mnesia
  - Top of chapter
  - Mnesia Database Management System (DBMS)
- Getting Started
  - Top of chapter
  - Starting Mnesia for the First Time
  - Example
- Build a Mnesia Database
  - Top of chapter
  - Define a Schema
  - Data Model
  - Start Mnesia
  - Create Tables
- Transactions and Other Access Contexts
  - Top of chapter
  - Transaction Properties
  - Locking
  - Dirty Operations
  - Record Names versus Table Names
  - Activity Concept and Various Access Contexts
  - Nested Transactions
  - Pattern Matching
  - Iteration
- Miscellaneous Mnesia Features
  - Top of chapter
  - Indexing
  - Distribution and Fault Tolerance
  - Table Fragmentation
  - Local Content Tables
  - Disc-Less Nodes
  - More about Schema Management
  - Mnesia Event Handling
  - Debugging Mnesia Applications
  - Concurrent Processes in Mnesia
  - Prototyping
  - Object-Based Programming with Mnesia
- Mnesia System Information
  - Top of chapter
  - Database Configuration Data
  - Core Dumps
  - Dumping Tables
  - Checkpoints
  - Startup Files, Log File, and Data Files
  - Loading Tables at Startup
  - Recovery from Communication Failure
  - Recovery of Transactions
  - Backup, Restore, Fallback, and Disaster Recovery
- Combine Mnesia with SNMP
  - Top of chapter
  - Combine Mnesia and SNMP
- Appendix A: Backup Callback Interface
  - Top of chapter
  - mnesia_backup Callback Behavior
- Appendix B: Activity Access Callback Interface
  - Top of chapter
  - mnesia_access Callback Behavior
- Appendix C: Fragmented Table Hashing Callback Interface
  - Top of chapter
  - mnesia_frag_hash Callback Behavior

# 8 Combine Mnesia with SNMP

### 8.1 Combine Mnesia and SNMP

Many telecommunications applications must be controlled and reconfigured remotely. It is sometimes an advantage to perform this remote control with an open protocol such as the Simple Network Management Protocol (SNMP). The alternatives to this would be the following:

- Not being able to control the application remotely
- Using a proprietary control protocol
- Using a bridge that maps control messages in a proprietary protocol to a standardized management protocol and conversely

All these approaches have different advantages and disadvantages. Mnesia applications can easily be opened to the SNMP protocol. A direct 1-to-1 mapping can be established between Mnesia tables and SNMP tables. This means that a Mnesia table can be configured to be both a Mnesia table and an SNMP table. A number of functions to control this behavior are described in the Reference Manual.