Monday, December 23, 2013

Bandwidth, Round Trip Trime (RTT) and Latency

In a world wide distributed computing environment, the large scale in terms of users and transactions spread over the whole planet becomes the main factor for performances.
Cheap hardware availability, strengthening of CPUs and growing sizes of RAM seem still have margins of growth, on another hand, network and disk spindles (we'll talk about spindles in a future post)  are the worst nightmare for SAs.
You can scale web server front ends, create master and slave databases or federated them with the best hardware layer 7 load balancer, to cache data in a well organized LRU cache farm, but you can't do too much on physical limitations of mechanics and electromagnetism.

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