DBMS > Nebula Graph
Nebula Graph System Properties
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|Editorial information provided by DB-Engines|
|Description||A distributed, linear scalable, high perfomant Graph DBMS|
|Primary database model||Graph DBMS|
|DB-Engines Ranking measures the popularity of database management systems|
|License Commercial or Open Source||Open Source Apache Version 2.0 + Common Clause 1.0|
|Cloud-based only Only available as a cloud service||no|
|DBaaS offerings (sponsored links) Database as a Service|
Providers of DBaaS offerings, please contact us to be listed.
|Server operating systems||Linux|
|Data scheme||Strong typed schema|
|Typing predefined data types such as float or date||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|
|Secondary indexes||yes Nebula Graph internally uses the Key-Value store RocksDB for persistency. The vertices, edges, and their properties are stored as Key while their values are stored as Value. The primary indexes are per Key and secondary indexes are per Value.|
|SQL Support of SQL||SQL-like query language|
|APIs and other access methods||Browser interface|
Proprietary native API
Query language nGQL
|Supported programming languages||C++|
|Partitioning methods Methods for storing different data on different nodes||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||Causal Clustering using Raft protocol|
|MapReduce Offers an API for user-defined Map/Reduce methods||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency|
|Foreign keys Referential integrity||yes Relationships in graphs|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID|
|Concurrency Support for concurrent manipulation of data||yes|
|Durability Support for making data persistent||yes using RocksDB|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes|
|User concepts Access control||Role-based access control|
|More information provided by the system vendor|
Nebula Graph is a truly distributed, linear scalable, lightning-fast graph database, while still providing millisecond latency, high availability and data security. Key features include:
Nebula Graph boasts the world's only graph database solution that is able to host graphs with dozens of billions of vertices and trillions of edges, while still providing millisecond latency, high availability and data security.
|Typical application scenarios|
Currently we have some top internet companies in China implementing Nebula Graph at trial stage. More are waiting in queue to use Nebula Graph in their production.
At our very early stage, Nebula Graph has already received over a thousand stars and hundreds of downloads and installs. And the numbers are counting.
|Licensing and pricing models|
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