DBMS > Alibaba Cloud Table Store vs. IBM Db2 Event Store vs. XTDB
System Properties Comparison Alibaba Cloud Table Store vs. IBM Db2 Event Store vs. XTDB
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|Editorial information provided by DB-Engines|
|Name||Alibaba Cloud Table Store Xexclude from comparison||IBM Db2 Event Store Xexclude from comparison||XTDB formerly named Crux Xexclude from comparison|
|Description||A fully managed Wide Column Store for large quantities of semi-structured data with real-time access||Distributed Event Store optimized for Internet of Things use cases||A general purpose database with bitemporal SQL and Datalog and graph queries|
|Primary database model||Wide column store||Event Store|
Time Series DBMS
|Current release||2.0||1.19, September 2021|
|License Commercial or Open Source||commercial||commercial free developer edition available||Open Source MIT License|
|Cloud-based only Only available as a cloud service||yes||no||no|
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|Implementation language||C and C++||Clojure|
|Server operating systems||hosted||Linux Linux, macOS, Windows for the developer addition||All OS with a Java 8 (and higher) VM|
|Typing predefined data types such as float or date||yes||yes||yes, extensible-data-notation format|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||no||no|
|SQL Support of SQL||no||yes through the embedded Spark runtime||limited SQL, making use of Apache Calcite|
|APIs and other access methods||HTTP API||ADO.NET|
RESTful HTTP API
|Supported programming languages||Java|
|Server-side scripts Stored procedures||no||yes||no|
|Partitioning methods Methods for storing different data on different nodes||Sharding Implicit feature of the cloud service||Sharding||none|
|Replication methods Methods for redundantly storing data on multiple nodes||yes Implicit feature of the cloud service||Active-active shard replication||yes, each node contains all data|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Eventual Consistency|
|Foreign keys Referential integrity||no||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||Atomic single-row operations||no||ACID|
|Concurrency Support for concurrent manipulation of data||yes||No - written data is immutable||yes|
|Durability Support for making data persistent||yes||Yes - Synchronous writes to local disk combined with replication and asynchronous writes in parquet format to permanent shared storage||yes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||yes|
|User concepts Access control||Access rights based on subaccounts and tokens||fine grained access rights according to SQL-standard|
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|Alibaba Cloud Table Store||IBM Db2 Event Store||XTDB formerly named Crux|
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