Samba on Scale

List of scalable Key/Value Stores

For an overview of Consistency Models see Jepsen or Wikipedia.

Name	Consistency Model	Transactions	C Client	Notes
ctdb	Volatile DBs: Sequential Consistency Persistent DBs: Linearizability	No Yes	yes
etcd	Linearizability	Yes ("mini")	yes	Performance?
Ceph Rados	Linearizability	?	yes
Apache Cassandra	Configurable: Linearizability with LWT New: Strict Serializability [1]	yes	yes
Apache HBase	?	?	?
Apache Ignite	?	?	?
FoundationDB	Strict Serializability	yes	yes
CockroachDB	Serializable+, Strong Partition Serializability	?	yes
ScyllaDB	Single-key Linearizability with LWT	?	yes
YugabyteDB	Linearizability with LWT	?	yes
tikv	Strong Consistency[2]	yes	no (C++)
Apache Pegasus	?	?	no (C++)

List of Opensource Clustered Filesystems

Name	Built on-top of Object Storage	Notes
Ceph	yes
GlusterFS	no
JuiceFS	yes
MooseFS	no
ObjectiveFS	yes
Lustre	no
BeegFS	no

Links

• A Comparison of Scalable Database Isolation Levels
• Correctness Anomalies Under Serializable Isolation
• Comparison of a few SQL and no-SQL DBs
• Summary of Paxos, Multipaxos, Raft, Epaxos and ACCORD
• Nice Summary of Consistency Models and Issues in CockroachDB
• FUSE Filesystem on-top of FoundationDB