Flockdb Alternatives

Flockdb

FlockDB is a distributed graph database for storing adjancency lists, with goals of supporting:

a high rate of add/update/remove operations
potientially complex set arithmetic queries
paging through query result sets containing millions of entries
ability to "archive" and later restore archived edges
horizontal scaling including replication
online data migration
Non-goals include:

multi-hop queries (or graph-walking queries)
automatic shard migrations