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DBMS > SQream DB vs. XTDB vs. YDB

System Properties Comparison SQream DB vs. XTDB vs. YDB

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Editorial information provided by DB-Engines
NameSQream DB  Xexclude from comparisonXTDB infoformerly named Crux  Xexclude from comparisonYDB  Xexclude from comparison
Descriptiona GPU-based, columnar RDBMS for big data analytics workloadsA general purpose database with bitemporal SQL and Datalog and graph queriesA distributed fault-tolerant database service, with high availability, scalability, immediate consistency and ACID transactions and providing an Amazon DynamoDB compatible API
Primary database modelRelational DBMSDocument storeDocument store
Relational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.70
Rank#227  Overall
#104  Relational DBMS
Score0.11
Rank#343  Overall
#46  Document stores
Score0.35
Rank#278  Overall
#43  Document stores
#127  Relational DBMS
Websitesqream.comgithub.com/­xtdb/­xtdb
www.xtdb.com
github.com/­ydb-platform/­ydb
ydb.tech
Technical documentationdocs.sqream.comwww.xtdb.com/­docsydb.tech/­en/­docs
DeveloperSQream TechnologiesJuxt Ltd.Yandex
Initial release201720192019
Current release2022.1.6, December 20221.19, September 2021
License infoCommercial or Open SourcecommercialOpen Source infoMIT LicenseOpen Source infoApache 2.0; commercial license available
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC++, CUDA, Haskell, Java, ScalaClojure
Server operating systemsLinuxAll OS with a Java 8 (and higher) VM
Linux
Linux
Data schemeyesschema-freeFlexible Schema (defined schema, partial schema, schema free)
Typing infopredefined data types such as float or dateyes, ANSI Standard SQL Typesyes, extensible-data-notation formatyes
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 indexesnoyesyes
SQL infoSupport of SQLyeslimited SQL, making use of Apache CalciteSQL-like query language (YQL)
APIs and other access methods.Net
JDBC
ODBC
HTTP REST
JDBC
RESTful HTTP API (DynamoDB compatible)
Supported programming languagesC++
Java
JavaScript (Node.js)
Python
Clojure
Java
Go
Java
JavaScript (Node.js)
PHP
Python
Server-side scripts infoStored proceduresuser defined functions in Pythonnono
Triggersnono
Partitioning methods infoMethods for storing different data on different nodeshorizontal and vertical partitioningnoneSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnoneyes, each node contains all dataActive-passive shard replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynonono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDByes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.no
User concepts infoAccess controlAccess rights defined for Yandex Cloud users

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More resources
SQream DBXTDB infoformerly named CruxYDB
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