There's also Instagram's implementation in PostgreSQL: http://instagram-engineering.tumblr.com/post/10853187575/sharding-ids-at-instagram http://instagram-engi

There's also Instagram's implementation in PostgreSQL: http://instagram-engineering.tumblr.com/post/10853187575/sharding-ids-at-instagram http://instagram-engineering.tumblr.com/post/10853187575/sha...