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Stellar
Stellar is a Learning Management System developed at MIT for managing the authoring and delivery of courses. It provides are stored. On top of these abstractions is built a layer of domain objects. The domain objects contain reusable business
faculty with the ability to: logic and are accessed both by tools that are part of the online web application, and also by stand alone java programs which
• Add and manage a wide variety of multimedia class materials without technical knowledge process feeds and other batch tasks.
• Manage class website membership automatically with official data from the Registrar, and become acquainted with
students through photos from the Card Office
Sakai is open source collaboration between several leading educational institutions, including MIT, to develop the next
• Simplify administrative tasks by managing homework submissions and letting students choose sections on the class generation of educational software. Their goals include developing a common, open system for learning management. It is
website expected that over the next 12-24 months, parts of the Sakai toolset such as the grade book will be introduced at MIT. In
• Communicate easily with students through announcements, email, and threaded discussions the long term it is likely that functionality currently provided by Stellar will be superceded by similar functionality provided by
Sakai, and that the Stellar application will gradually be replaced by an implementation of Sakai at MIT. More information on
the Sakai project can be found at: http://www.sakaiproject.org
Stellar is available for use by all departments and faculty at MIT. For the Fall 2004 semester there are 293 class websites,
which represents approximately 40% of all classes taught at MIT.
Stellar is a java-based application, primarily a web application delivered through Tomcat and the Apache web server. There is
a abstraction for accessing the database and also for accessing the file system where course materials
Stellar Logical Architecture Diagram Stellar Physical Architecture Diagram
Users
Key: Facility W91 - Primary Facility W20 - Backup Key:
Production Apache Web Server 1: Backup Apache Web Server 2: Facility or
System Location
Hardware: Sun Hardware: Sun
Component Operating System: Sun Solaris Operating System: Sun Solaris
Software: Apache Webserver Software: Apache Webserver
Physical
Related Server or
Web Server - Apache System
Other MIT Systems Storage
In Bound:
- Card Office (Student Photos) Production Tomcat Server: Apache Web Server 2:
- Data Warehouse Other MIT Hardware: Sun, 4CPU, 16GB Memory Hardware: Sun
- Kerberos Users Application Server - Tomcat System Operating System: Sun Solaris Operating System: Sun Solaris
- Classes Software: Software:
- Apache Tomcat - Apache Tomcat
- Enrollments
- Stellar Application - Stellar Application (Read Only)
External Oracle
- Oracle Database Server
Application - Stellar
Out Bound: System Replication
- DSpace Servlet
Production Database Server:
Hardware: Sun, 4CPU, 16GB Memory
Standalone Operating System: Sun Solaris
Tools Standalone
Tools Software: Oracle Database Server
Standalone
Tools
Tools
External Systems Domain Objects
In Bound: User Group Nexus Arc
-
Database Filesystem RAID for Database RAID for Filesystem Secondary RAID
Abstraction Abstraction Storage Storage Vendor:
Vendor: Vendor: Model:
Model: Model: Capacity:
Out Bound: Capacity: Capacity:
RFS Replication
-
Database - Oracle Filesystem Storage
Version 0.1 – August – September 2004 Prepared by Sapient for MIT 1
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This document represents a snapshot of an evolving set of documents. For information on further iterations, please visit: http://istwiki.mit.edu/istwiki/ItagFrontPage
