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NoSQL Systems

Consequences of sharding

So how's that working out?

  • The realization that query languages are useful: SQL-like query languages are being added to NoSQL systems.

  • The realization that durability is important: If a database is accepting hundreds of writes per second, and there is a 0.1 sec lag between "commit" and data actually reaching disk, you will lose "committed" data

  • About that name ...: Lame attempt to claim that NoSQL actually means: Not Only SQL.

  • Reality sets in: Many stories about disasters with NoSQL systems, and the rewrite using MySQL or Postgres.

  • ACID: MongoDB has added optional (!) ACID transactions.

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