Nebula Graph RC3 Release Notes

Main features and fixes for this release include dump_tools to export data by specific filters, graph data exploring tool Nebula Graph Studio, and vertex/edge scan interface for OLAP scenarios.

Below is a list of details.

Query engine

• Support fetching all props of a given vertex #1486
• Support DELETE EDGE to delete the given edge #1063
• Add IF EXISTS to conditionally drop a tag/edgetype only if it exists. #1505
• Add IF NOT EXISTS to conditionally create a space/tag/edge only if it not exists #1379
• Export graphd metrics #1451

Storage

• Add scan edge/vertex interface to retrieve data from storage for OLAP, #1381
• Support heartbeat_interval_secs option to config heartbeat interval between storage/graph and meta #1540
• Pushdown filter to minimize data transfer and improve query performance #947
• Support local conf mode, using local conf rather than config in meta server #1411
• Add timeout for storage/meta clients, the default value is 60s and configured by meta_client_timeout_ms option #1399
• Support creating a snapshot for the whole cluster #1199 #1372
• Both support reading from leader/follow and support only read from the leader #1363
• Add check step for each balance task during balancing process. #1378

Build

• Simplify the build process, support most of Linux Kernel 2.6.32+ system #1332

Index

• Support create an index，get a list of all indexes in the space and drop a index #1459 #1360

Tools

• dump_tools , an off-line data dumping tool that can be used to dump or count data with specified conditions. #1479 #1554
• Spark Writer adopts async client，add hash and uuid support，support load data into the same schema from different data source #1405 #1512.
• Spark Writer supports configuring Spark partition，more numerous partitions allow work to be distributed among more workers, however, fewer partitions allow work to be done in larger chunks (and often quicker). #1412

UI

• Nebula Graph Studio is the graphical user interface for working with Nebula. Query, visualize nebula and import CSV data to Nebula. Visualize and explore graph data via the interface; an editor with syntax highlighting feature enables users to design queries fast and view query results in a structured manner; support data import via GUI. Here’s the repo of this tool (including documentation and deployment files): https://github.com/vesoft-inc/nebula-web-docker

Coming soon

Features

• Profiling
• Execution plan
• Subgraph
• Bidirectional query
• Clone space schema info
• OLAP interface enhancement
• Permission management
• Sampling

Tools

• Containerization

UI

• Nebula Graph Studio enhancement

Welcome to try Nebula Graph database and do let us know if you have any feedback or encounter any problem via the channels below:

• Slack
• Forum for devs