Release-notes
NebulaGraph 1.0 Release Notes
Basic Features
- Online DDL & DML. Support updating schemas and data without stopping or affecting your ongoing operations.
- Graph traversal.
GO
statement supports forward/reverse and bidirectional graph traversal.GO minHops TO maxHops
is supported to get variable hops relationships. - Aggregate. Support aggregation functions such as
GROUP BY
,ORDER BY
, andLIMIT
. - Composite query. Support composite clauses:
UNION
,UNION DISTINCT
,INTERSECT
, andMINUS
. - PIPE statements. The result yielded from the previous statement could be piped to the next statement as input.
- Use defined variables. Support user-defined variables to pass the result of a query to another.
- Index. Both the single-property index and composite index are supported to make searches of related data more efficient.
LOOKUP ON
statement is to query on the index.
Advanced Features
- Privilege Management. Support user authentication and role-based access control. NebulaGraph can easily integrate with third-party authentication systems. There are five built-in roles in NebulaGraph:
GOD
,ADMIN
,DBA
,USER
, andGUEST
. Each role has its corresponding privileges. - Support Reservoir Sampling, which will retrieve k elements randomly for the sampling of the supernode at the complexity of
O(n)
. - Cluster snapshot. Support creating snapshots for the cluster as an online backup strategy.
- TTL. Support TTL to expire items after a certain amount of time automatically.
- Operation & Maintenance
- Scale in/out. Support online scale in/out and load balance for storage
HOSTS
clause to manage storage hostsCONFIGS
clause to manage configuration options
- Job Manager & Scheduler. A tool for job managing and scheduling. Currently,
COMPACT
andFLUSH
jobs are supported. - Graph Algorithms. Support finding the full path and the shortest path between vertices.
- Provide OLAP interfaces to integrate with third-party graph analytics platforms.
- Support multiple character sets and collations. The default
CHARSET
andCOLLATE
areutf8
andutf8_bin
.
Clients
- Java Client. Support source code building and downloading from the MVN repository, see Java Client for more details.
- Python Client. Support source code building and installation with pip, see Python Client for more details.
- Golang Client. Install the client with the command
go get -u -v github.com/vesoft-inc/nebula-go
,see Go Client for more details.
NebulaGraph Studio
A graphical user interface for working with Nebula. Support querying, designing schema, data loading, and graph exploring. See NebulaGraph Studio for more details.
Tools
- Data Import
- Nebula-Importer is used to import data from the CSV file.
- Spark Writer, a Spark-based distributed data import tool that converts data from multiple data resources into the NebulaGraph.
- Data Export
- Dump Tool. A single-machine off-line data dumping tool to dump or count data with specified conditions.
- Monitoring
- Nebula Stats Exporter (for Prometheus), is to collect database metrics and expose metrics to Prometheus. And Grafana has integrated for metrics Visualization and Alerting.