DBMS > Amazon CloudSearch vs. etcd
System Properties Comparison Amazon CloudSearch vs. etcd
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Our visitors often compare Amazon CloudSearch and etcd with MongoDB, Elasticsearch and PostgreSQL.
|Editorial information provided by DB-Engines|
|Name||Amazon CloudSearch Xexclude from comparison||etcd Xexclude from comparison|
|Description||A hosted search engine service by Amazon with the data stored in Amazons cloud||A distributed reliable key-value store|
|Primary database model||Search engine||Key-value store|
|Current release||3.4, August 2019|
|License Commercial or Open Source||commercial||Open Source Apache Version 2.0|
|Cloud-based only Only available as a cloud service||yes||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||hosted||FreeBSD|
|Typing predefined data types such as float or date||yes||no|
|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|
|Secondary indexes||yes all search fields are automatically indexed||no|
|SQL Support of SQL||no||no|
|APIs and other access methods||HTTP API||gRPC|
JSON over HTTP
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||no||no|
|Triggers||no||yes, watching key changes|
|Partitioning methods Methods for storing different data on different nodes||yes automatic partitioning across Amazon Search Instance as required|
|Replication methods Methods for redundantly storing data on multiple nodes||yes managed transparently by AWS||Using Raft consensus algorithm to ensure data replication with strong consistency among multiple replicas.|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency|
|Foreign keys Referential integrity||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||no|
|Concurrency Support for concurrent manipulation of data||yes||yes|
|Durability Support for making data persistent||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no|
|User concepts Access control||authentication via encrypted signatures||no|
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