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DBMS > Realm vs. SurrealDB vs. XTDB

System Properties Comparison Realm vs. SurrealDB vs. XTDB

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Editorial information provided by DB-Engines
NameRealm  Xexclude from comparisonSurrealDB  Xexclude from comparisonXTDB infoformerly named Crux  Xexclude from comparison
DescriptionA DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core DataA fully ACID transactional, developer-friendly, multi-model DBMSA general purpose database with bitemporal SQL and Datalog and graph queries
Primary database modelDocument storeDocument store
Graph DBMS
Document store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score7.18
Rank#52  Overall
#8  Document stores
Score1.11
Rank#174  Overall
#30  Document stores
#17  Graph DBMS
Score0.13
Rank#330  Overall
#45  Document stores
Websiterealm.iosurrealdb.comgithub.com/­xtdb/­xtdb
www.xtdb.com
Technical documentationrealm.io/­docssurrealdb.com/­docswww.xtdb.com/­docs
DeveloperRealm, acquired by MongoDB in May 2019SurrealDB LtdJuxt Ltd.
Initial release201420222019
Current releasev1.5.0, May 20241.19, September 2021
License infoCommercial or Open SourceOpen SourceOpen SourceOpen Source infoMIT License
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageRustClojure
Server operating systemsAndroid
Backend: server-less
iOS
Windows
Linux
macOS
Windows
All OS with a Java 8 (and higher) VM
Linux
Data schemeyesschema-freeschema-free
Typing infopredefined data types such as float or dateyesyesyes, extensible-data-notation format
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nono
Secondary indexesyesyes
SQL infoSupport of SQLnoSQL-like query languagelimited SQL, making use of Apache Calcite
APIs and other access methodsGraphQL
RESTful HTTP API
WebSocket
HTTP REST
JDBC
Supported programming languages.Net
Java infowith Android only
Objective-C
React Native
Swift
Deno
Go
JavaScript (Node.js)
Rust
Clojure
Java
Server-side scripts infoStored proceduresno inforuns within the applications so server-side scripts are unnecessaryno
Triggersyes infoChange Listenersno
Partitioning methods infoMethods for storing different data on different nodesnonenone
Replication methods infoMethods for redundantly storing data on multiple nodesnoneyes, each node contains all data
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate Consistency
Foreign keys infoReferential integritynono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyes
Durability infoSupport for making data persistentyesyesyes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes infoIn-Memory realm
User concepts infoAccess controlyesyes, based on authentication and database rules

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More resources
RealmSurrealDBXTDB infoformerly named Crux
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