Understanding Configuration Options

To determine the initial configuration of the IMSMA^NG system, it is important to understand the two ways in which IMSMA^NG can be set up and the basic architecture of the system. IMSMA^NG is a client-server software application designed to run in stand-alone or client-server mode. In a stand-alone system, both the IMSMA^NG client and server are installed on the same computer. The stand-alone configuration is the simpler type of installation: it requires no additional network equipment or infrastructure and is easy to maintain.

Comparison of Standalone and Client-Server Configuration Options

Configuration	Advantages	Disadvantages
Standalone	Simple to set up and maintain Limited IT knowledge required Can be upgraded to a networked configuration later	One-at-a-time data access
Networked	Multiple concurrent data access Redundancy	Complicated to set up and maintain Networked infrastructure required Multiple computers required

In a client-server configuration, one computer acts as a server and many other computers can connect to it simultaneously over a network, enabling multiple people to access the same data at the same time. A client-server installation requires at least two computers and a network infrastructure connecting the computers together. Using a client-server installation, a mine action programme can have multiple data entry clerks entering data at the same time.

Client-Server Configuration

Client-Server Architecture

Whether a programme uses a stand-alone installation or a client-server installation, the IMSMA^NG software has two main components:

• the IMSMA^NG server
• the IMSMA^NG client

The figure below shows the parts of the software; the following sections then explain the functions that each part performs.

Client-Server Architecture

Server

The IMSMA^NG server stores data and manages much of the data processing. The server has two main parts, the datastore and the business layer. The datastore is where data is stored for retrieval by the IMSMA^NG client. IMSMA^NG uses a MySQL relational database to store data on the server. Additionally, IMSMA^NG stores other data including attachments and some configuration files on the server in file format. The MySQL database is accessible via a variety of database access tools designed for browsing relational databases.

While the database contains many relational database constraints designed to preserve data integrity, all updates of data should be handled through the business layer rather than with direct SQL updates in order to maintain integrity. Failure to do so will likely cause data corruption or loss

The business layer is where rules are implemented to ensure data quality and consistency. The business layer takes data from the datastore and transforms it for display in the IMSMA^NG client. All data interaction between the client and server database is handled through the business layer, which allows for multiple clients to be connected to the database while preserving data integrity in cases of multiple requests. This includes access from the IMSMA^NG client and from the reporting tool.

Client

The IMSMA^NG client is the interface through which users can connect to the server and browse the system, enter data and generate outputs. The client includes an integrated GIS and reporting tools. Based on ESRI’s ArcGIS Engine, the GIS performs all geospatial calculations including distance/bearing calculation, coordinate conversion and reprojection. The GIS also allows each client to load and manage its own maps and geographic data which the client receives from the IMSMA^NG server. As a result, each client receives and locally stores a complete copy of geographic data from the IMSMA^NG server when it is connected to the server. This synchronized data is stored in a client ―sandbox‖ separate from the server and can always be updated by connecting to the server.

JasperSoft’s iReport tool is built into each IMSMA^NG client and allows users to access data from the database via the business layer. With iReport, users can generate reports containing tabular data, subreports and cross tabs as well as various types of charts and graphs. These reports can easily be localized into any language that IMSMA^NG supports. Additional reporting options include direct connections to the IMSMA^NG database via ODBC. This functionality supports tools such as Crystal Reports, Microsoft® Access®, Microsoft Excel® and various open-source reporting tools.