DBMS > Immudb vs. Quasardb
System Properties Comparison Immudb vs. Quasardb
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|Editorial information provided by DB-Engines|
|Name||Immudb Xexclude from comparison||Quasardb Xexclude from comparison|
|Description||An open source immutable (append-only) database with cryptographic verification which makes it tamper-resistant and fully auditable.||Distributed, high-performance timeseries database|
|Primary database model||Key-value store||Time Series DBMS|
|Secondary database models||Relational DBMS|
|Current release||1.2.3, April 2022||3.13.3, April 2022|
|License Commercial or Open Source||Open Source Apache Version 2.0||commercial Free community edition, Non-profit organizations and non-commercial usage are eligible for free licenses|
|Cloud-based only Only available as a cloud service||no||no|
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|Server operating systems||BSD|
|Typing predefined data types such as float or date||yes integer and binary|
|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|
|Secondary indexes||yes||yes with tags|
|SQL Support of SQL||SQL-like syntax||SQL-like query language|
|APIs and other access methods||gRPC protocol|
PostgreSQL wire protocol
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||no||no|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding consistent hashing|
|Replication methods Methods for redundantly storing data on multiple nodes||Source-replica replication with selectable replication factor|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||with Hadoop integration|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes|
|Durability Support for making data persistent||yes||yes by using LevelDB|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||yes Transient mode|
|User concepts Access control||Cryptographically strong user authentication and audit trail|
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