http://db-engines.com/en/system/HBase%3BMemcached%3BRedis%3BSolr
| 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 engine based onApache Lucene |
| Developer |
Apache Software Foundation |
Danga Interactive |
MongoDB, Inc |
Salvatore Sanfilippo |
Apache Software Foundation |
| Initial release |
2008 |
2003 |
2009 |
2009 |
2004 |
| License |
Open Source |
Open Source |
Open Source |
Open Source |
Open Source |
| Implementation language |
Java |
C |
C++ |
C |
Java |
| Server operating systems |
Linux |
Linux |
Linux |
Linux |
All OS with a Java VM and a servlet container |
| Unix |
Unix |
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| OS X |
OS X |
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| Windows |
Windows |
Windows |
Windows |
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FreeBSD |
Solaris |
BSD |
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| Database model |
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| Data scheme |
schema-free |
schema-free |
schema-free |
schema-free |
yes |
| Typing |
no |
no |
yes |
no |
yes |
| Secondary indexes |
no |
no |
yes |
no |
yes |
| SQL |
no |
no |
no |
no |
no |
| APIs and other access methods |
Java API |
Proprietary protocol |
proprietary protocol using JSON |
proprietary protocol |
Java API |
| RESTful HTTP API |
RESTful HTTP API |
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| Thrift |
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| Supported programming languages |
C |
C |
C |
C |
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| C# |
.Net |
C# |
C# |
.Net |
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| C++ |
C++ |
C++ |
C++ |
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| Groovy |
ColdFusion |
Groovy |
Clojure |
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| Java |
Java |
Java |
Java |
Java |
|
| Erlang |
Erlang |
Erlang |
Erlang |
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| Python |
Python |
Python |
Python |
Python |
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| Scala |
Lua |
Scala |
Scala |
Scala |
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Ruby |
Ruby |
Ruby |
Ruby |
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| PHP |
PHP |
PHP |
PHP |
PHP |
|
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JavaScript |
JavaScript |
JavaScript |
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|
Perl |
Perl |
Perl |
Perl |
|
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OCaml |
Lua |
Lua |
any language that supports sockets and either XML or JSON |
|
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Lisp |
Lisp |
Lisp |
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Dart |
Dart |
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ColdFusion |
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Go |
Go |
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Actionscript |
Objective-C |
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Haskell |
Haskell |
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Smalltalk |
Smalltalk |
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Clojure |
Tcl |
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MatLab |
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PowerShell |
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Prolog |
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| Server-side scripts |
yes |
no |
JavaScript |
Lua |
Java plugins |
| Triggers |
yes |
no |
no |
no |
no |
| Partitioning methods |
Sharding |
none |
Sharding |
none |
Sharding |
| Replication methods |
selectable replication factor |
none |
Master-slave replication |
Master-slave replication |
cloud/distributed (via Zookeeper) |
| Master-slave replication |
|||||
| MapReduce |
yes |
no |
yes |
no |
no |
| Consistency concepts |
Immediate Consistency |
|
Eventual Consistency |
|
Eventual Consistency |
| Immediate Consistency |
|||||
| Foreign keys |
no |
no |
no |
no |
no |
| Transaction concepts |
no |
no |
no |
optimistic locking |
optimistic locking |
| Concurrency |
yes |
yes |
yes |
yes |
yes |
| Durability |
yes |
no |
yes |
yes |
yes |
| User concepts |
Access Control Lists (ACL) |
yes |
Users can be defined with full access or read-only access |
very simple password-based access control |
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| Specific characteristics |
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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 |
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Mostly used for caching |
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Applications that can hold all data in memory, and that have high performance requirements. |
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