Notes to myself:Scalable internet scale architectures

Databases are hard to scale and are generally the bottleneck in scaling internet scale systems. Typical solutions to scale databases include:

1. Sharding – distribute records using some criteria

2. Separating database reads and writes: Database writes are slower where as reads are faster. Have a single/multiple(sharded) database for writing and many read databases.

3. Split the database horizontally and vertically

4. Use caching technologies like memcached/hypertable/big table etc.

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