Prepare a cut-over plan to roll out an upgrade to a website application that has 200,000 hits
Question:
Prepare a “cut-over” plan to roll out an upgrade to a website application that has 200,000 hits per day. This load is experienced mainly in the normal waking hours of the United States but is not limited to US-based customers.
This environment includes:
An app server running on a virtual machine that is spread across 4 servers
A database server that is running on a virtual machine spread across 3 servers
Application logic is split between the app server tier and the database tier
The presentation tier consists of webpages, mobile app
Take into account the following business restrictions:
Downtime is limited to 1 hour.
Application is critical to the business. During the cutover, if there are problems, we must rollback the changes rather than risk bugs getting into the production system.
There are limited personnel in your staff to be able to perform this cut over
Your staff if highly trained, ready, willing and able to do whatever you ask them to do
Assume that the application upgrade is fully tested but during testing there have been a few abnormalities in processing that may present themselves during upgrade.
Assume that what can go wrong will go wrong. Plan for contingencies for 2 possible hiccups.
Financial Reporting and Analysis
ISBN: 978-0078025679
6th edition
Authors: Flawrence Revsine, Daniel Collins, Bruce, Mittelstaedt, Leon