I just saw a story about the NSA gearing up a datacenter to potentially hold a yottabyte of surveillance data. The whole surveillance angle itself is pretty interesting, but what caught my attention was the concept of the yottabyte. The yottabyte is 1024 bytes. That is three levels above the petabyte, which itself is a million gigabytes. If that doesn’t make much sense to you, here is a chart from wikipedia that might help:
As little as 10 years ago the petabyte seemed just as large and amazing as the yottabyte sounds today. Now it is common for companies such as Google or Facebook to hold several petabytes of information in just one of their many datacenters across the world.






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