zlacker

I used to work at Hyves. Hyves overcame it's scalability issues, but went out of business for other reasons. Hyves used MySQL and Memcache similar to facebook at that time.

By the way, RocksDB which is now Facebook's main database (afaik) is written on top of LevelDB. So both Google and Facebook run on software written by Jeff Dean...

>>ma2rte+(OP)
Its a leveldb fork with substantial changes. For example, a non binary search file format option: https://github.com/facebook/rocksdb/wiki/PlainTable-Format

Pull down the code some time. Everything and the kitchen sink is in there somewhere. It's a crazy project.