本篇文章主要介绍了"Cassandra vs MongoDB vs CouchDB vs Redis vs Riak vs HBase vs Couchbase vs Orient"，主要涉及到方面的内容，对于其他数据库感兴趣的同学可以参考一下：
The most popular onesRedis (V3.0RC)Written in: CMain point: Blazing fastLicense:...
For example: Displaying sports scores on various displays and/or online. Monitoring systems. Fast workflow applications.
Riak (V1.2)
- Written in: Erlang & C, some JavaScript
- Main point: Fault tolerance
- License: Apache
- Protocol: HTTP/REST or custom binary
- Stores blobs
- Tunable trade-offs for distribution and replication
- Pre- and post-commit hooks in JavaScript or Erlang, for validation and security.
- Map/reduce in JavaScript or Erlang
- Links & link walking: use it as a graph database
- Secondary indices: but only one at once
- Large object support (Luwak)
- Comes in "open source" and "enterprise" editions
- Full-text search, indexing, querying with Riak Search
- In the process of migrating the storing backend from "Bitcask" to Google's "LevelDB"
- Masterless multi-site replication and SNMP monitoring are commercially licensed
Best used: If you want something Dynamo-like data storage, but no way you're gonna deal with the bloat and complexity. If you need very good single-site scalability, availability and fault-tolerance, but you're ready to pay for multi-site replication.
For example: Point-of-sales data collection. Factory control systems. Places where even seconds of downtime hurt. Could be used as a well-update-able web server.
VoltDB (2.8.4.1)
- Written in: Java
- Main point: Fast transactions and rapidly changing data
- License: AGPL v3 and proprietary
- Protocol: Proprietary
- In-memory relational database.
- Can export data into Hadoop
- Supports ANSI SQL
- Stored procedures in Java
- Cross-datacenter replication
Best used: Where you need to act fast on massive amounts of incoming data.
For example: Point-of-sales data analysis. Factory control systems.
Kyoto Tycoon (0.9.56)
