DBMS > etcd vs. IBM Db2 Event Store vs. STSdb
System Properties Comparison etcd vs. IBM Db2 Event Store vs. STSdb
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|Editorial information provided by DB-Engines|
|Name||etcd Xexclude from comparison||IBM Db2 Event Store Xexclude from comparison||STSdb Xexclude from comparison|
|Description||A distributed reliable key-value store||Distributed Event Store optimized for Internet of Things use cases||Key-Value Store with special method for indexing optimized for high performance using a special indexing method|
|Primary database model||Key-value store||Event Store|
Time Series DBMS
|Developer||IBM||STS Soft SC|
|Current release||3.4, August 2019||2.0||4.0.8, September 2015|
|License Commercial or Open Source||Open Source Apache Version 2.0||commercial free developer edition available||Open Source GPLv2, commercial license available|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Implementation language||Go||C and C++||C#|
|Server operating systems||FreeBSD|
|Linux Linux, macOS, Windows for the developer addition||Windows|
|Typing predefined data types such as float or date||no||yes||yes primitive types and user defined types (classes)|
|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|
|SQL Support of SQL||no||yes through the embedded Spark runtime||no|
|APIs and other access methods||gRPC|
JSON over HTTP
RESTful HTTP API
|.NET Client API|
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||no||yes||no|
|Triggers||yes, watching key changes||no||no|
|Partitioning methods Methods for storing different data on different nodes||Sharding||none|
|Replication methods Methods for redundantly storing data on multiple nodes||Using Raft consensus algorithm to ensure data replication with strong consistency among multiple replicas.||Active-active shard replication||none|
|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||no||no||no|
|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|
|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||no||fine grained access rights according to SQL-standard||no|
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|etcd||IBM Db2 Event Store||STSdb|
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