Vitess (via) I remember looking at Vitess when it was first released by YouTube in 2012. The idea of a proven horizontally scalable sharding mechanism for MySQL was exciting, but I was put off by the need for a custom Go or Java client library. Apparently that changed with Vitess 2.1 in April 2017, the first version to introduce a MySQL protocol compatible proxy which can be connected to by existing code written in any language. Vitess 3.0 came out last December so now the MySQL proxy layer is much more stable. Vitess is used in production by a bunch of other companies now (including Slack and Square) so it’s definitely worth a closer look.
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