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DBMS > Crux vs. Datomic vs. RocksDB

System Properties Comparison Crux vs. Datomic vs. RocksDB

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Editorial information provided by DB-Engines
NameCrux  Xexclude from comparisonDatomic  Xexclude from comparisonRocksDB  Xexclude from comparison
DescriptionCrux is a general purpose database with bitemporal SQL and Datalog and graph queriesDatomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durabilityEmbeddable persistent key-value store optimized for fast storage (flash and RAM)
Primary database modelDocument storeRelational DBMSKey-value store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.12
Rank#312  Overall
#41  Document stores
Score1.93
Rank#120  Overall
#59  Relational DBMS
Score3.44
Rank#88  Overall
#14  Key-value stores
Websitegithub.com/­juxt/­crux
opencrux.com
www.datomic.comrocksdb.org
Technical documentationopencrux.com/­reference/­installation.htmldocs.datomic.comgithub.com/­facebook/­rocksdb/­wiki
DeveloperJuxt Ltd.CognitectFacebook, Inc.
Initial release201920122013
Current release1.12.1, September 20200.9.5951, July 20196.22.1, July 2021
License infoCommercial or Open SourceOpen Source infoMIT Licensecommercial infolimited edition freeOpen Source infoBSD
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageClojureJava, ClojureC++
Server operating systemsAll OS with a Java 8 (and higher) VM
Linux
All OS with a Java VM
Data schemeschema-freeyesschema-free
Typing infopredefined data types such as float or dateyes, extensible-data-notation formatyesno
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.nonono
Secondary indexesyesyesno
SQL infoSupport of SQLlimited SQL, making use of Apache Calcitenono
APIs and other access methodsHTTP REST
JDBC
RESTful HTTP APIC++ API
Java API
Supported programming languagesClojure
Java
Clojure
Java
C++
Java
Server-side scripts infoStored proceduresnoyes infoTransaction Functionsno
TriggersnoBy using transaction functionsno
Partitioning methods infoMethods for storing different data on different nodesnonenone infoBut extensive use of caching in the application peersnone
Replication methods infoMethods for redundantly storing data on multiple nodesyes, each node contains all datanone infoBut extensive use of caching in the application peersnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate Consistency
Foreign keys infoReferential integritynonono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDyes
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDByes infousing external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)yes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes inforecommended only for testing and developmentyes
User concepts infoAccess controlnono

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CruxDatomicRocksDB
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