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		<updated>2025-03-13T23:30:55Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Comparison: &lt;/span&gt; sort-under&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{short description|None}}&lt;br /&gt;
&lt;br /&gt;
{{distinguish|COM Structured Storage}}&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Structured storage&amp;#039;&amp;#039;&amp;#039; is [[computer storage]] for [[data structure|structured data]], often in the form of a [[distributed database]].&amp;lt;ref&amp;gt;{{cite web&lt;br /&gt;
  |url        = http://perspectives.mvdirona.com/CommentView,guid,afe46691-a293-4f9a-8900-5688a597726a.aspx&lt;br /&gt;
  |title      = Perspectives: One Size Does Not Fit All&lt;br /&gt;
  |last       = Hamilton&lt;br /&gt;
  |first      = James&lt;br /&gt;
  |date       = 3 November 2009&lt;br /&gt;
  |access-date = 13 November 2009&lt;br /&gt;
}}&amp;lt;/ref&amp;gt; [[Computer software]] formally known as structured storage systems include [[Apache Cassandra]],&amp;lt;ref&amp;gt;{{cite journal&lt;br /&gt;
  |last1      = Lakshman&lt;br /&gt;
  |first1     = Avinash&lt;br /&gt;
  |last2      = Malik&lt;br /&gt;
  |first2     = Prashant&lt;br /&gt;
  |title      = Cassandra - A Decentralized Structured Storage System&lt;br /&gt;
  |publisher  = Cornell University&lt;br /&gt;
  |url        = http://www.cs.cornell.edu/projects/ladis2009/papers/lakshman-ladis2009.pdf&lt;br /&gt;
  |access-date = 13 November 2009&lt;br /&gt;
}}&amp;lt;/ref&amp;gt; [[Google]]&amp;#039;s [[Bigtable]]&amp;lt;ref&amp;gt;{{cite journal |last=Chang |first=Fay |author2=Jeffrey Dean |author3=Sanjay Ghemawat |author4=Wilson C. Hsieh |author5=Deborah A. Wallach |author6=Mike Burrows |author7=Tushar Chandra |author8=Andrew Fikes |author9=Robert E. Gruber |title=Bigtable: A Distributed Storage System for Structured Data |url=http://labs.google.com/papers/bigtable-osdi06.pdf |access-date=13 November 2009 |archive-date=11 May 2008 |archive-url=https://web.archive.org/web/20080511173356/http://labs.google.com/papers/bigtable-osdi06.pdf |url-status=dead }}&amp;lt;/ref&amp;gt; and [[Apache HBase]].&amp;lt;ref&amp;gt;{{cite web&lt;br /&gt;
  |url        = http://wiki.apache.org/hadoop/HBase/HBasePresentations?action=AttachFile&amp;amp;do=get&amp;amp;target=hbaseintro.pdf&lt;br /&gt;
  |title      = HBase: structured storage of sparse data for Hadoop&lt;br /&gt;
  |last       = Kellerman&lt;br /&gt;
  |first      = Jim&lt;br /&gt;
  |access-date = 20 February 2016&lt;br /&gt;
}}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==Comparison==&lt;br /&gt;
The following is a comparison of notable structured storage systems.&lt;br /&gt;
{{sort-under}}&lt;br /&gt;
{| class=&amp;quot;wikitable sortable sort-under&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Project Name&lt;br /&gt;
! Type&lt;br /&gt;
! [[Persistence (computer science)|Persistence]]&lt;br /&gt;
! [[Replication (computer science)|Replication]]&lt;br /&gt;
! [[High Availability]]&lt;br /&gt;
! [[Transaction processing|Transactions]]&lt;br /&gt;
! [[Rack-locality Awareness]]&lt;br /&gt;
! [[Programming Language|Implementation Language]]&lt;br /&gt;
! Influences, [[Sponsor (commercial)|Sponsors]]&lt;br /&gt;
! [[Software license|License]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Aerospike (database)|Aerospike]]&lt;br /&gt;
| [[NoSQL]] database&lt;br /&gt;
| {{Yes}}, Hybrid DRAM and flash for persistence&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}, Distributed for scale&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| C (small bits of assembly language)&lt;br /&gt;
| Aerospike&lt;br /&gt;
| [[GNU Affero General Public License|AGPL v3]]&lt;br /&gt;
|-&lt;br /&gt;
| [[AllegroGraph]]&lt;br /&gt;
| [[Graph database]]&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}} - v5, 2010&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| [[Common Lisp]]&lt;br /&gt;
| Franz Inc.&lt;br /&gt;
| [[Proprietary software|Proprietary]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Apache Ignite]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| To and from an underlying persistent storage (e.g. an [[Relational database management system|RDBMS]])&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| [[Java (programming language)|Java]]&lt;br /&gt;
| [[Apache Software Foundation|Apache]], GridGain Systems&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Apache Jackrabbit]]&lt;br /&gt;
| Key-value &amp;amp; Hierarchical &amp;amp; Document&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| likely&lt;br /&gt;
| [[Java (programming language)|Java]]&lt;br /&gt;
| [[Apache Software Foundation|Apache]], [[Roy Fielding]], [[Day Software]]&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Berkeley DB]]/[[DBM (computing)|Dbm]] 1.x&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| [[C (programming language)|C]]&lt;br /&gt;
| old school&lt;br /&gt;
| Various&lt;br /&gt;
|-&lt;br /&gt;
| [[Berkeley DB]] Sleepycat/Oracle Berkeley DB 5.x&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C, [[C++]], or Java&lt;br /&gt;
| dbm, Sleepycat/Oracle&lt;br /&gt;
| dual GPL-like Sleepycat License&lt;br /&gt;
|-&lt;br /&gt;
| [[Apache Cassandra]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Distributed&lt;br /&gt;
| {{partial}} Only supports CAS (Check And Set) after 2.1.1 and later&amp;lt;ref&amp;gt;[https://stackoverflow.com/questions/2976932/cassandra-transaction-support java - Cassandra - transaction support - Stack Overflow]&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;[https://docs.datastax.com/en/cassandra/2.1/cassandra/dml/dml_ltwt_transaction_c.html Lightweight transactions]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Java&lt;br /&gt;
| Dynamo and [[Bigtable]], Facebook/Digg/Rackspace&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Clustrix | ClustrixDB]]&lt;br /&gt;
| scale-out relational&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Distributed and Replication&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C&lt;br /&gt;
| Clustrix&lt;br /&gt;
| Proprietary&lt;br /&gt;
|-&lt;br /&gt;
| [[Oracle Coherence|Coherence]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| Persistent data typically in an [[Relational database management system|RDBMS]]&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| [[Java (programming language)|Java]]&lt;br /&gt;
| [[Oracle Corporation|Oracle]] (previously Tangosol)&lt;br /&gt;
| [[Proprietary software|Proprietary]]&lt;br /&gt;
|- &lt;br /&gt;
| [[Oracle NoSQL Database]] &lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| Java&lt;br /&gt;
| Oracle&lt;br /&gt;
| [[GNU Affero General Public License|AGPL]]v3 License or proprietary&lt;br /&gt;
|-&lt;br /&gt;
| [[Couchbase]]&lt;br /&gt;
| Document&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}, with two-phase commits&amp;lt;ref&amp;gt;[http://docs.couchbase.com/developer/dev-guide-3.0/transactional-logic.html Providing transactional logic]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| [[C++]], [[Erlang (programming language)|Erlang]], [[C (programming language)|C]],&amp;lt;ref&amp;gt;{{cite web |author= Damien Katz|url=http://damienkatz.net/2013/01/the_unreasonable_effectiveness_of_c.html |title=The Unreasonable Effectiveness of C |date= January 8, 2013 |access-date= September 30, 2016 }}&amp;lt;/ref&amp;gt; [[Go (programming language)|Go]]&lt;br /&gt;
| [[CouchDB]], [[Memcached]]&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[CouchDB]]&lt;br /&gt;
| Document&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| replication + load balancing&lt;br /&gt;
| Atomicity is per document, per CouchDB instance&amp;lt;ref&amp;gt;{{Cite web |url=http://wiki.apache.org/couchdb/Frequently_asked_questions#How_do_I_use_transactions_with_CouchDB.3F |title=How do I use transactions with CouchDB? |access-date=2012-07-12 |archive-url=https://web.archive.org/web/20120716033737/http://wiki.apache.org/couchdb/Frequently_asked_questions#How_do_I_use_transactions_with_CouchDB.3F |archive-date=2012-07-16 |url-status=dead }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{No}}&lt;br /&gt;
| [[Erlang (programming language)|Erlang]]&lt;br /&gt;
| Lotus Notes / Ubuntu, Mozilla, IBM&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Extensible Storage Engine]](ESE/NT)&lt;br /&gt;
| Document or Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C++, Assembly&lt;br /&gt;
| [[Microsoft]]&lt;br /&gt;
| [[Proprietary software|Proprietary]]&lt;br /&gt;
|-&lt;br /&gt;
| [[FoundationDB]]&lt;br /&gt;
| Ordered Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Depends on user configuration&lt;br /&gt;
| C++&lt;br /&gt;
| FoundationDB&lt;br /&gt;
| [[Proprietary software|Proprietary]]&lt;br /&gt;
|-&lt;br /&gt;
| [[GT.M]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}} &lt;br /&gt;
| Depends on user configuration&lt;br /&gt;
| C (small bits of assembly language)&lt;br /&gt;
| FIS&lt;br /&gt;
| [[GNU Affero General Public License|AGPL v3]]&lt;br /&gt;
|-&lt;br /&gt;
! Project Name&lt;br /&gt;
! Type&lt;br /&gt;
! Persistence&lt;br /&gt;
! Replication&lt;br /&gt;
! High Availability&lt;br /&gt;
! Transactions&lt;br /&gt;
! Rack-locality Awareness&lt;br /&gt;
! Implementation Language&lt;br /&gt;
! Influences, Sponsors&lt;br /&gt;
! License&lt;br /&gt;
|-&lt;br /&gt;
| [[Apache HBase]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}. Major version upgrades require re-import.&lt;br /&gt;
| {{yes}} [[HDFS]],&amp;lt;ref&amp;gt;[http://wiki.apache.org/hadoop/Hbase HBase: Bigtable-like structured storage for Hadoop HDFS]&amp;lt;/ref&amp;gt; [[Amazon S3]]&amp;lt;ref&amp;gt;[http://hbase.s3.amazonaws.com/hbase/HBase-EC2-HUG9.pdf HBase on EC2]{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }}&amp;lt;/ref&amp;gt; or [[Amazon Elastic Block Store]].&amp;lt;ref&amp;gt;[http://aws-musings.com/hbase-on-ec2-using-ebs-volumes-lessons-learned/ HBase on EC2 using EBS volumes : Lessons Learned | My AWS Musings]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{yes}}&amp;lt;ref&amp;gt;[http://wiki.apache.org/hadoop/Hbase/MultipleMasters Hbase/MultipleMasters - Hadoop Wiki]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{yes}}&amp;lt;ref&amp;gt;[http://hadoop-hbase.blogspot.com.es/2012/03/acid-in-hbase.html ACID in HBase]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| See HDFS, S3 or EBS.&lt;br /&gt;
| Java&lt;br /&gt;
| [[Bigtable]]&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Information Management System]] IBM IMS aka DB1&lt;br /&gt;
| Key-value. Multi-level&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}, with HALDB&lt;br /&gt;
| {{Yes}}, with IMS TM&lt;br /&gt;
| Unknown&lt;br /&gt;
| [[Assembly language|Assembler]]&lt;br /&gt;
| IBM since 1966&lt;br /&gt;
| [[Proprietary software|Proprietary]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Infinispan]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}} &lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Java&lt;br /&gt;
| Red Hat &lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Memcached]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{partial}} Only supports CAS (Check And Set - or Compare And Swap)&amp;lt;ref&amp;gt;[https://stackoverflow.com/questions/5187323/memcache-with-transactions sql - Memcache with transactions? - Stack Overflow]&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;[http://benrobb.com/wp-content/uploads/2009/01/memcached.pdf Memcached]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C&lt;br /&gt;
| Six Apart/Couchbase/Fotolog/Facebook &lt;br /&gt;
| BSD-like permissive copyright by Danga&lt;br /&gt;
|-&lt;br /&gt;
| [[LevelDB]]&lt;br /&gt;
| Key-value, [[Bigtable]]&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{partial}} Multiple writes can be combined into single operation&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C++&lt;br /&gt;
| Google &lt;br /&gt;
| New BSD License&lt;br /&gt;
|-&lt;br /&gt;
| [[Lightning Memory-Mapped Database|LightningDB]]&lt;br /&gt;
| Key-value, memory-mapped files&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| {{Yes}}, ACID, MVCC&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C&lt;br /&gt;
| Symas&lt;br /&gt;
| OpenLDAP Public License&lt;br /&gt;
|-&lt;br /&gt;
&lt;br /&gt;
| [[MongoDB]]&lt;br /&gt;
| Document (JSON)&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| fail-over&lt;br /&gt;
| {{partial}} Single document atomicity&amp;lt;ref&amp;gt;[http://www.mongodb.org/display/DOCS/Atomic+Operations Atomic Operations - MongoDB]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C++&lt;br /&gt;
| 10gen&lt;br /&gt;
| [[GNU Affero General Public License|GNU AGPL v3.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Neo4j]]&lt;br /&gt;
| [[Graph database]]&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| Java&lt;br /&gt;
| Neo Technology&lt;br /&gt;
| [[General Public License|GNU GPL v3.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[OrientDB]]&lt;br /&gt;
| Multi-Model (Graph-Document-Object-Key/Value)&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&amp;lt;ref&amp;gt;{{Cite web |url=http://www.orientechnologies.com/docs/last/orientdb.wiki/Replication.html |title=OrientDB Replication |access-date=2015-01-08 |archive-url=https://web.archive.org/web/20141228115019/http://www.orientechnologies.com/docs/last/orientdb.wiki/Replication.html |archive-date=2014-12-28 |url-status=dead }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&amp;lt;ref&amp;gt;{{Cite web |url=http://www.orientechnologies.com/docs/last/orientdb.wiki/Distributed-Architecture-Lifecycle.html |title=OrientDB Distributed Architecture Lifecycle |access-date=2015-01-08 |archive-url=https://web.archive.org/web/20150119021159/http://www.orientechnologies.com/docs/last/orientdb.wiki/Distributed-Architecture-Lifecycle.html |archive-date=2015-01-19 |url-status=dead }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&amp;lt;ref&amp;gt;{{Cite web |url=http://www.orientechnologies.com/docs/last/orientdb.wiki/Transactions.html |title=OrientDB Transactions |access-date=2015-01-08 |archive-url=https://web.archive.org/web/20150118022259/http://www.orientechnologies.com/docs/last/orientdb.wiki/Transactions.html |archive-date=2015-01-18 |url-status=dead }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Java&lt;br /&gt;
| Orient Technologies&lt;br /&gt;
| [[Apache License|Apache 2.0]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Redis]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}. But last few queries can be lost.&amp;lt;ref&amp;gt;[http://redis.io/topics/persistence Redis Persistence]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&amp;lt;ref&amp;gt;[https://stackoverflow.com/questions/4719346/redis-master-slave-replication-single-point-of-failure high availability - Redis master/slave replication - single point of failure? - Stack Overflow]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{Yes}}&amp;lt;ref&amp;gt;[http://redis.io/topics/transactions Transactions – Redis]&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{No}}&lt;br /&gt;
| Ansi-C&lt;br /&gt;
| VMWare, Memcache&lt;br /&gt;
| [[BSD licenses|BSD]]&lt;br /&gt;
|-&lt;br /&gt;
| [[ScyllaDB]]&lt;br /&gt;
| Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Distributed and Replication&amp;lt;ref&amp;gt;{{Cite web |url=http://docs.scylladb.com/architecture/architecture-fault-tolerance/ |title=Scylla Architecture - Fault Tolerance |website=Scylla Docs |language=en |access-date=2018-07-07}}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| {{No}}&amp;lt;ref&amp;gt;{{Cite web |url=http://docs.scylladb.com/cassandra-compatibility/ |title=Scylla Apache Cassandra Compatibility |website=Scylla Docs |language=en |access-date=2018-07-07}}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| Unknown&lt;br /&gt;
| C++&lt;br /&gt;
| [[Apache Cassandra]]&lt;br /&gt;
| [[GNU Affero General Public License|AGPL v3]]&lt;br /&gt;
|-&lt;br /&gt;
| [[SimpleDB]] (Amazon.com)&lt;br /&gt;
| Document &amp;amp; Key-value&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}} (automatic)&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| Unknown&lt;br /&gt;
| likely&lt;br /&gt;
| Erlang&lt;br /&gt;
| Amazon.com&lt;br /&gt;
| Amazon internal only&lt;br /&gt;
|-&lt;br /&gt;
| [[Tarantool]]&lt;br /&gt;
| Free-dimensional tuples with primary and secondary keys&lt;br /&gt;
| {{Yes}}. (Asynchronous)&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{Yes}}&lt;br /&gt;
| {{No}}&lt;br /&gt;
| C, Lua&amp;lt;ref&amp;gt;{{Cite web | url=https://github.com/tarantool/tarantool | title=Tarantool | website=[[GitHub]] | date=29 April 2022 }}&amp;lt;/ref&amp;gt;&lt;br /&gt;
| Memcached, Mnesia, MySQL, [[Mail.ru]]&lt;br /&gt;
| [[BSD licenses|BSD]]&lt;br /&gt;
|-&lt;br /&gt;
! Project Name&lt;br /&gt;
! Type&lt;br /&gt;
! Persistence&lt;br /&gt;
! Replication&lt;br /&gt;
! High Availability&lt;br /&gt;
! Transactions&lt;br /&gt;
! Rack-locality Awareness&lt;br /&gt;
! Implementation Language&lt;br /&gt;
! Influences, Sponsors&lt;br /&gt;
! License&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==See also==&lt;br /&gt;
* [[NoSQL]]&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
{{Reflist|2}}&lt;br /&gt;
&lt;br /&gt;
{{Cloud computing}}&lt;br /&gt;
[[Category:Structured storage]]&lt;br /&gt;
[[Category:Database software comparisons|structured storage]]&lt;/div&gt;</summary>
		<author><name>imported&gt;Cedar101</name></author>
	</entry>
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