...
Data Store (& Link) | Indexed | In-mem | Dist/Scalable data, index | Durable | Latency | Throughput | Consistency | API | Additional comments |
|---|---|---|---|---|---|---|---|---|---|
| RAMCloud | y | y | y, y | y [n] | ? | ? | Linearizable | keys - val | |
| MySQL SE | y | n | y, ? (replication) | y | Transaction safe, ACID compliant | relational | |||
| MySQL Cluster | y | n | y, ? (replication & partitioning) | y | SQL and NoSQL | ||||
| Cassandra | y | cache | y, y* | y | BASE (Basically Available Soft-state Eventual Consistency) + Can choose consistency level | partitioned rows (similar to sql) + denormalization + materialized views | *: each node indexes data it holds locally | ||
| MongoDB | y | cache | y | document oriented storage: JSON-style docs with dynamic schemas | |||||
| H-Store | ? (1) | y | y, ? | row-based-relational | |||||
| VoltDB | ? (1) | y | y, ? | ACID for transactions; unclear otherwise. | relational | Commercial H-store | |||
| G-Store | n | ||||||||
| LevelDB | n | key-val | |||||||
| Spanner | n | Externally-consistent | |||||||
| F1 | y | n | y, ? | y | > mysql | Strong in gen, consistent global indexes | relational + sql | Uses Spanner; Google ads used MySQL. This made their db scalable. | |
| kind-of* | n | y, - | y (2) | Relaxed | Basic relational | *: Optional secondary table lazily maintained; keyed on index key | |||
| DynamoDB | y | n (ssd) | y, ? | y (2) | single digit ms | Strong consistency on reads | tables, no fixed schemas. each item: diff num of attrs | ||
| BigTable | n | key-val | |||||||
| Espresso | y | n | y, ? | y | Timeline-consistent | document oriented NoSQL | Uses MySQL/InnoDB as storage engine. Also uses Lucene+Databus+Helix | ||
| Postgres | ? (1) | n | y, ? | y (2) | ACID compliant, MVCC | object-relational | |||
| COPS | n | Causal+ | key-val | ||||||
| Eiger | n | Causal | column-store | ||||||
| Hyperdex [paper] | y | n | y, ? | Key ops are linearizable; Warp (commercial extension) has ACID transactions | key-val; rich datatypes | ||||
| H-Base | n | y, - | Strictly consistent reads and writes | versioned, non-relational | Modeled after BigTable | ||||
| Cloudera Impala | ? (1) | n | y, ? | SQL interface | Massively parallel processing arch for perf w/ Hadoop Scalability | ||||
| Redis | n | y | y, - | optional | key-val; keys can contain strings, hashes, lists, sets, sorted sets | ||||
| CouchDB | y | y, ? | y | Eventually consistent | JSON | ||||
| BigCouch | y | Commercial couchdb on steroids | |||||||
| Voldermort | n | cache | y | y | hash table | ||||
| NuDB | relational? |
Footnotes:
(1): Probably yes since they claim to be relational / sql.
...