
Reliable Distributed Systems. Fundamentals. Overview of Lecture. Fundamentals: terminology and components of a reliable distributed computing system Communication technologies and their properties Basic communication services Internet protocols End-to-end argument. Some terminology.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Fundamentals
Cookie identifies this user, encodes past preferences
Database
HTTP request
Web browser with stashed cookies
Web servers are kept current by the database but usually don’t talk to it when your request comes in
Web servers have no memory of the interaction
Purchase is a “transaction” on the database
Did the sudden growth inin LAN speed give us the Web?
Source: Scientific American, Sept. 1995
WAN, disk latencies are
fairly constant due to
physical limitations
Note dramatic drop in
LAN latencies over ATM:
This is the hardware usedtelephone systems
End-user applications
Built over and with…
Middleware platform
Built over and with…
Internet and Web Standards (TCP, XML, etc)