vesoft-inc/nebula v1.0.0-rc4

Nebula Graph v1.0.0-RC4

on GitHub

!! Note：RC4 is not compatible with the Data inserted before commitID 43453a0 (2020.02.06) due to the change of the underlying data structure.

New features

• Support Index to make searches of related data more efficient. An index on a property/properties combination can be created with CREATE INDEX. DROP INDEX is to drop an index #1776. REBUILD INDEX is to reindex the data #1566.

• Support LOOKUP ON to query on index #1705. See #1738 for the performance of Storage Engine when inserting data with an index.

• Introduces account management and access control #1842, #1873. All users may perform only the operations permitted to them. Roles provided by Nebula Graph and their privileges please refer to #1929. Add --enable_authorize=true to nebula-graphd.conf and restart the services to enable authentication.

• Support TTL to remove items after a certain amount of time automatically #1584、#422, #1934.

• Enhance DELETE VERTEX to support deleting a batch of vertices. And supports hash() and uuid() functions for VertexID #1317, #1759.

• Introduces Job Manager, to manage the jobs that take a long time of Storage Engine. At present, it supports flush and compact operations. SUBMIT JOB is to submit a job, STOP JOB stops the running jobs，SHOW JOB shows the details info of a job， RECOVER JOB is to put back the failed job to the queue #1424.

• Support BIDIRECT for GO query to traverse along with both ingoing and outgoing directions #1740, #1752.

• Support Reservoir Sampling, set enable_reservoir_sampling to TRUE is to turn on the sampling. Max_edge_returned_per_vertex in nebula-storage.conf is to configure the number of returned edges #1746, #1915.

• Support more character sets and collations. SHOW CHARSET and SHOW COLLATION statement show all available character sets and collations. It can be configured when creating the space. The default CHARSET is utf8, and the corresponding COLLATE is utf8_bin #1709.

OLAP Interface

• Add Spark example for Nebula Graph.

Tools

• Support Deploying Nebula Graph on Kubernetes with Helm #1473
• Introduce Nebula Stats Exporter (for Prometheus) to collect database metrics and expose metrics to Prometheus. And Grafana has integrated for metrics Visualization and Alerting.

Change

• RC4 is not compatible with the Data inserted before commitID 43453a0 (2020.02.06) due to the change of the underlying data structure.
• DOC move to repo vesoft-inc/nebula-doc
• For Nebula Python Client, is_async is not supported when creating ConnectionPool. Async client will be introduced later.
• _src in REVERSELY and BIDIRECT statements represent the queried node instead of the src of the edge. While _dst refers to the other connected nodes. e.g. GO FROM <vid> OVER <edgetype> YIELD edgetype._src returns the vid. #1740