The CAP Theorem in the Cloud

i found this theorem interesting -

You may have heard of the CAP theorem: no distributed computing system can offer partition tolerance, basic availability, and immediate consistency all at once. You can have any two of these characteristics, but not all three.

Partition tolerance essentially means that the nodes in a distributed application can lose communication with each other, and the app will continue to function. With basic availability, individual nodes may fail without bringing down the app. Immediate consistency means that data on each node will always be consistent with every other node.

Extracted From - http://www.devx.com/blog/2012/08/the-cap-theorem-in-the-cloud.html