[…] think of a bucket of sand. If every grain of sand in the bucket was 1 byte of data, then:
- The entire work of Shakespeare fills just one bucket of sand (about 5MB)
- A fast financial market data feed (OPRA) fills a beach of sand in 24 hours (about 5TB)
- Google processes all the sand in the world every week (about 100PB)
- We generate 60% more sand every year
In these terms, all of Twitter generates only a sand castle of quality data a day.
This is the sand generated directly by humans. Then we have the machine generated data.
Original title and link: BigData in Context (NoSQL databases © myNoSQL)