Bandwidth Usage: Andrew Web Server-Computing Services - Carnegie Mellon University

Bandwidth Usage Guideline: Andrew Web Server


The Carnegie Mellon Computing Policy establishes a general policy for the use of computing, telephone and information resources. The purpose of this guideline is to establish acceptable practices that support the policy as it applies to bandwidth usage on the Andrew Web Server.

This guideline was established to ensure that the Carnegie Mellon community has a clear understanding of proper procedure and usage, and to ensure that an acceptable level of performance is maintained on the Andrew Web Server.

Computing Services reserves the right to modify this guideline as necessary. Any changes to this guideline will be posted to official.computing-news and will be reflected on this web page.

Applies to

This guideline applies to all campus affiliates. This includes students, faculty and staff members as well as guest account holders.


Factors which can have a negative impact on the Andrew Web Server include, but are not limited to:
  • providing large files for download
  • providing extremely popular content which is downloaded frequently

Guideline Statement

Computing Services will limit the bandwidth used by any organization or personal web directory hosted on in instances where that web directory attracts excessive access. Excessive access is defined as over 4 GB in a single day. This is regardless of whether the directory is accessed from the campus network or from the Internet outside the university.

Once bandwidth limits are imposed on a web directory, the directory will be permitted to serve no more than 30 MB of bandwidth per six hours. After thirty days, this limit will be lifted, but may be renewed if the directory again exceeds the limit of 4 GB in a single day.

Notification: If bandwidth limitations are imposed on a directory, the owner will be notified via Computing Services NISC system.

While limits are enforced, visitors to the affected web site may encounter an error message web page.

User Responsibilities and Procedures

Typically, excessive access is caused when a directory provides large files for download or extremely popular content which is downloaded frequently. Owners of servers or services who exceed the usage guideline and feel they have legitimate cause to do so, must contact

In rare cases an exemption may be granted. In all cases, solutions for fair use of the Andrew Web Server will favor those services that support the research and educational goals of the university.

Revision History

Last Updated: August 24, 2012
Last Updated: October 19, 2005
Established: February 1, 2005