Comparing the typical caracteristics of the 9 different types of database engines: data representation, scaling, operations they are fast or slow at, etc.

1. Sheet1
Conc
Control Data storage Replication Txn
Redis Locks RAM Async N
Scalaris Locks RAM Sync L
Tokyo Locks RAM or disk Async L
Voldemort MVCC RAM or BDB Async N
SimpleDB None S3 Async N
Riak MVCC Pluggable Async N
MongoDB Field-level Disk Async N
Couch DB MVCC Disk Async N
HBase Locks Hadoop Async L
HyperTable Locks Files Sync L
Cassandra MVCC Disk Async L
Locks +
BigTable stamps GFS Sync + Async L
ScaleDB Locks Disk Sync Y
MySQL Cluster Locks Disk or RAM Sync Y
MySql MyIsam Locks Disk Async N
MySQL InnoDB MVCC Disk Async Y
Drizzle Locks Disk Sync Y
PostgreSQL MVCC Disk Pluggable Y
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