Windows Azure will handle the load balancing for all of the instances that are created. The VM sizes are as follows :
* Compute Instance Size CPU Memory Instance Storage I/O Performance
* Extra Small 1.0 GHz 768 MB 20 GB Low
* Small 1.6 GHz 1.75 GB 225 GB Moderate
* Medium 2 x 1.6 GHz 3.5 GB 490 GB High
* Large 4 x 1.6 GHz 7 GB 1,000 GB High
* Extra-large 8 x 1.6 GHz 14 GB 2,040 GB High
