Very interesting article by James Kobelius expanding the V’s model to NoSQL databases. The article is focusing mostly on a 4th V, veracity which translates to how databases deal with consistency.
All of which raises a huge issue for NoSQL databases: in their current
incarnations, with this veracity limitation, can they evolve into OLTP
and/or EDW roles? After all, the very concept of a “system of record” or
“single version of the truth” depends on having a database that supports
low-lagged high veracity.
The only thing missing from the article is a look at what happens with the first 3 V’s when RDBMS choose the last V.
Actually we might already know the answer. There’s almost no Variety. And to get Volume and Velocity you have to pay a Very-high price. Still 4 V’s.
Original title and link: The NoSQL conundrum: Lagged veracity and the double-edged promise of eventual consistency