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- <title>Overview and Features</title>
- <meta name="description" content="The i-scream Project is a central monitoring system for Unix, Linux and NT servers.">
- <meta name="keywords" content="i-scream, project, central monitoring system, unix, linux, nt, server, alert">
- <meta name="generator" content="notepad on acid, aye.">
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- <center><h3>Key Features of The System</h3></center>
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- <ul>
- <li>A centrally stored, dynamically reloaded, system wide configuration system</li>
- <li>A totally extendable monitoring system, nothing except the Host (which
- generates the data) and the Clients (which view it) know any details about
- the data being sent, allowing data to be modified without changes to the
- server architecture.</li>
- <li>Central server and reporting tools all Java based for multi-platform portability</li>
- <li>Distribution of core server components over CORBA to allow appropriate components
- to run independently and to allow new components to be written to conform with the
- CORBA interfaces.</li>
- <li>Use of CORBA to create a hierarchical set of data entry points to the system
- allowing the system to handle event storms and remote office locations.</li>
- <li>One location for all system messages, despite being distributed.</li>
- <li>XML data protocol used to make data processing and analysing easily extendable</li>
- <li>A stateless server which can be moved and restarted at will, while Hosts,
- Clients, and reporting tools are unaffected and simply reconnect when the
- server is available again.</li>
- <li>Simple and open end protocols to allow easy extension and platform porting of Hosts
- and Clients.</li>
- <li>Self monitoring, as all data queues within the system can be monitored and raise
- alerts to warn of event storms and impending failures (should any occur).</li>
- <li>A variety of web based information displays based on Java/SQL reporting and
- PHP on-the-fly page generation to show the latest alerts and data</li>
- <li>Large overhead monitor Helpdesk style displays for latest Alerting information</li>
- </ul>
-
- <center><h3>An Overview of the i-scream Central Monitoring System</h3></center>
-
- <p align="left">
- The i-scream system monitors status and performance information
- obtained from machines feeding data into it and then displays
- this information in a variety of ways.
- </p>
-
- <p align="left">
- This data is obtained through the running of small applications
- on the reporting machines. These applications are known as
- "Hosts". The i-scream system provides a range of hosts which are
- designed to be small and lightweight in their configuration and
- operation. See the website and appropriate documentation to
- locate currently available Host applications. These hosts are
- simply told where to contact the server at which point they are
- totally autonomous. They are able to obtain configuration from
- the server, detect changes in their configuration, send data
- packets (via UDP) containing monitoring information, and send
- so called "Heartbeat" packets (via TCP) periodically to indicate
- to the server that they are still alive.
- </p>
-
- <p align="left">
- It is then fed into the i-scream server. The server then splits
- the data two ways. First it places the data in a database system,
- typically MySQL based, for later extraction and processing by the
- i-scream report generation tools. It then passes it onto to
- real-time "Clients" which handle the data as it enters the system.
- The system itself has an internal real-time client called the "Local
- Client" which has a series of Monitors running which can analyse the
- data. One of these Monitors also feeds the data off to a file
- repository, which is updated as new data comes in for each machine,
- this data is then read and displayed by the i-scream web services
- to provide a web interface to the data. The system also allows TCP
- connections by non-local clients (such as the i-scream supplied
- Conient), these applications provide a real-time view of the data
- as it flows through the system.
- </p>
-
- <p align="left">
- The final section of the system links the Local Client Monitors to
- an alerting system. These Monitors can be configured to detect
- changes in the data past threshold levels. When a threshold is
- breached an alert is raised. This alert is then escalated as the
- alert persists through four live levels, NOTICE, WARNING, CAUTION
- and CRITICAL. The alerting system keeps an eye on the level and
- when a certain level is reached, certain alerting mechanisms fire
- through whatever medium they are configured to send.
- </p>
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i-scream / www.i-scream.org.git / blobdiff