DBMS > etcd vs. H2GIS vs. Microsoft SQL Server
System Properties Comparison etcd vs. H2GIS vs. Microsoft SQL Server
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|Editorial information provided by DB-Engines|
|Name||etcd Xexclude from comparison||H2GIS Xexclude from comparison||Microsoft SQL Server Xexclude from comparison|
|Description||A distributed reliable key-value store||Spatial extension of H2||Microsofts flagship relational DBMS|
|Primary database model||Key-value store||Spatial DBMS||Relational DBMS|
|Secondary database models||Relational DBMS||Document store|
|Current release||3.4, August 2019||SQL Server 2019, November 2019|
|License Commercial or Open Source||Open Source Apache Version 2.0||Open Source LGPL 3.0||commercial restricted free version is available|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||FreeBSD|
|Typing predefined data types such as float or date||no||yes||yes|
|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||yes|
|SQL Support of SQL||no||yes||yes|
|APIs and other access methods||gRPC|
JSON over HTTP
Tabular Data Stream (TDS)
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||no||yes based on H2||Transact SQL, .NET languages, R, Python and (with SQL Server 2019) Java|
|Triggers||yes, watching key changes||yes||yes|
|Partitioning methods Methods for storing different data on different nodes||none||tables can be distributed across several files (horizontal partitioning); sharding through federation|
|Replication methods Methods for redundantly storing data on multiple nodes||Using Raft consensus algorithm to ensure data replication with strong consistency among multiple replicas.||yes based on H2||yes, but depending on the SQL-Server Edition|
|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||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes, multi-version concurrency control (MVCC)||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||yes||yes|
|User concepts Access control||no||yes based on H2||fine grained access rights according to SQL-standard|
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|etcd||H2GIS||Microsoft SQL Server|
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