Nebula Graph v2.0.0 rc1 Release Note

[jamieliu1023]

We are happy to announce that Nebula Graph v2.0.0 rc1 has just been released!

In this version, Integer type VertexID is now supported. Please note that Nebula Graph v1.x cannot be directly upgraded to v2.x due to data and schema compatibility issues. The dev team is working on this to ensure a smoother upgrade experience.

New Features

• Add Integer vertexID support, refer to the PRs below for details:
  https://github.com/vesoft-inc/nebula-graph/pull/496
  https://github.com/vesoft-inc/nebula-common/pull/351
  https://github.com/vesoft-inc/nebula-storage/pull/246
  https://github.com/vesoft-inc/nebula-docs/pull/264
• FIND PATH supports to find paths with or without regard to direction, see https://github.com/vesoft-inc/nebula-graph/pull/464; and also supports to exclude cycles in paths, see https://github.com/vesoft-inc/nebula-graph/pull/461.
• SHOW HOSTS graph/meta/storage supports to retrieve the basic information of graphd/metad/storaged hosts. See the PRs below for details:
  https://github.com/vesoft-inc/nebula-graph/pull/437
  https://github.com/vesoft-inc/nebula-common/pull/325
  https://github.com/vesoft-inc/nebula-storage/pull/223
• BALANCE DATA RESET PLAN supports resetting the last failed plan. See the PRs below for details:
  https://github.com/vesoft-inc/nebula-common/pull/342
  https://github.com/vesoft-inc/nebula-storage/pull/232
• Enhance MATCH clause support, see https://docs.nebula-graph.io/2.0/3.ngql-guide/7.general-query-statements/2.match/.
• Add path manipulation support. See the PRs below for details:
  https://github.com/vesoft-inc/nebula-common/pull/306
  https://github.com/vesoft-inc/nebula-common/pull/358

Changelog

• Changed the default port numbers of metad, graphd, and storaged to avoid port number conflict. See the PRs below for details:
  https://github.com/vesoft-inc/nebula-graph/pull/474
  https://github.com/vesoft-inc/nebula-storage/pull/239

How to Upgrade

Please note that you cannot directly upgrade to Nebula Graph v2.0.0-beta from Nebula Graph 1.x. Follow the steps below to upgrade:

1. Stop all Nebula services
   – Execute scripts/nebula.service stop all on each machine
   – Execute scripts/nebula.service status all to confirm all services are stopped
2. Install the new RPM package on each machine according to the OS you are using
   – Get package: https://github.com/vesoft-inc/nebula-graph/releases/tag/v2.0.0-rc1
   – Uninstall the original RPM package rpm -e nebula-graph-2.0.0-alpha.el6.x86_64.rpm
   – Install package: rpm -Uvh nebula-graph-2.0.0-rc1.el6.x86_64.rpm
3. Start Nebula
   – Execute scripts/nebula.service start all on each machine
   – Execute scripts/nebula.service status all to confirm Nebula services are started on each machine

If you encounter any problem during the upgrade, please feel free to leave your comment below!