项目名称	语言	容错性	持久性存储介质	客户端协议	数据模型	文档	赞助商/社区
Project Voldemort	Java	分区, 复制, read-repair	Pluggable: BerkleyDB, Mysql	Java API	Structured / blob / text	A	Linkedin, no
Ringo	Erlang	分区, 复制, immutable	Custom on-disk (append only log)	HTTP	blob	B	诺基亚, no
Scalaris	Erlang	分区, 复制, paxos	In-memory only	Erlang, Java, HTTP	blob	B	OnScale, no
Kai	Erlang	分区, 复制?	On-disk Dets file	Memcached	blob	C	no
Dynomite	Erlang	分区, 复制	Pluggable: couch, dets	Custom ascii, Thrift	blob	D+	Powerset, no
MemcacheDB	C	复制	BerkleyDB	Memcached	blob	B	新浪网, some
ThruDB	C++	复制	Pluggable: BerkleyDB, Custom, Mysql, S3	Thrift	Document oriented	C+	Third rail, unsure
CouchDB	Erlang	复制, 分区?	Custom on-disk	HTTP, json	Document oriented (json)	A	Apache, yes
Cassandra	Java	复制, 分区	Custom on-disk	Thrift	Bigtable meets Dynamo	F	Facebook, no
HBase	Java	复制, 分区	Custom on-disk	Custom API, Thrift, Rest	Bigtable	A	Apache, yes
Hypertable	C++	复制, 分区	Custom on-disk (HDFS, KFS)	Thrift, other	Bigtable	A	Zvents, 百度, yes
Tokyo Tyrant	C	复制	Tokyo Cabinet	Memcached, HTTP, other	blob	A	mixi.jp, no