| Name |
HBase |
Memcached |
MongoDB |
Redis |
Solr |
||||||
| Description |
Wide-column store based on Apache Hadoop and on concepts of BigTable |
In-memory key-value store,originally intended for caching | One of the most popular document stores | In-memory database with configurable options performance vs. persistency | A widely usedenterprise search enginebased onApache Lucene | ||||||
| Developer |
Apache Software Foundation | Danga Interactive | MongoDB,Inc | Salvatore Sanfilippo | Apache Software Foundation | ||||||
| Initial release |
2008 | 2003 | 2009 | 2004 | |||||||
| License |
Open Source | Open Source | |||||||||
| Implementation language |
Java | C | C++ | Java | |||||||
| Linux | Linux | All OS with a Java VM and a servlet container | |||||||||
| Unix | Unix | ||||||||||
| OS X | OS X | ||||||||||
| Windows | Windows | ||||||||||
| FreeBSD | Solaris | BSD | |||||||||
| Database model |
|||||||||||
| Data scheme |
schema-free | yes | |||||||||
| Typing |
no | yes | Secondary indexes | sql | no | ||||||
| APIs and other access methods |
Java API | Proprietary protocol | proprietary protocol using JSON | proprietary protocol | Java API | ||||||
| RESTful HTTP API | RESTful HTTP API | ||||||||||
| Thrift | |||||||||||
| Supported programming languages |
C | ||||||||||
| C# | .Net | .Net | |||||||||
| C++ | |||||||||||
| Groovy | ColdFusion | Clojure | |||||||||
| Java | |||||||||||
| Erlang | Erlang | ||||||||||
| Python | Python | ||||||||||
| Scala | Lua | Scala | |||||||||
| Ruby | Ruby | ||||||||||
| PHP | PHP | ||||||||||
| JavaScript | JavaScript | ||||||||||
| Perl | Perl | ||||||||||
| OCaml | any language that supports sockets and either XML or JSON | ||||||||||
| Lisp | |||||||||||
| Dart | Go | Actionscript | Objective-C | Haskell | Smalltalk | Clojure | Tcl | MatLab | PowerShell | Prolog | |
| Server-side scripts |
Java plugins | ||||||||||
| Triggers |
no | ||||||||||
| Partitioning methods |
Sharding | none | Sharding | ||||||||
| Replication methods |
selectable replication factor | Master-slave replication | Master-slave replication | cloud/distributed (via Zookeeper) | |||||||
| Master-slave replication | |||||||||||
| MapReduce |
Consistency concepts | Immediate Consistency | Eventual Consistency | Eventual Consistency | |||||||
| Immediate Consistency | |||||||||||
| Foreign keys |
Transaction concepts | no | optimistic locking | optimistic locking | |||||||
| Concurrency |
Durability | User concepts | Access Control Lists (ACL) | Users can be defined with full access or read-only access | very simple password-based access control | Specific characteristics | Redis very much emphasize performance. In any design decisions performance has priority over features or memory requirements. | Architecture: Lives in web stack,ships by default with Jetty. Connectors,JDBC,multiple languages,true morphological CJK,binary document filters (Tika),Entity Extraction (UIMA) | |||
| Typical application scenarios |
Mostly used for caching | Applications that can hold all data in memory,and that have high performance requirements. |
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