Vitess v3.0.0-rc.1

This is the first release candidate of the 3.0 release.

We expect minimal changes between this and the final 3.0 release.

Download

• Server binaries are available in the Docker image "vitess/lite:v3.0.0-rc.1".
• Java client packages are published on Maven Central (To be uploaded).
• Source code is available via the tag "v3.0.0-rc.1".

Usability

• Tutorial that runs on Minikube
• Tutorial that runs on local host
• Simplified db parameters for vttablet
• Formal support for externally managed mysql

Monitoring

• Prometheus plug-in

SQL constructs

• Comment directives: QUERY_TIMEOUT_MS=1000, MULTI_SHARD_AUTOCOMMIT, SKIP_QUERY_PLAN_CACHE
• Partial Scatter
• New ALTER VSCHEMA syntax
• Multi-table DDL statements
• Workbench connectivity
• Cross-shard subqueries
• Improved handling of select * constructs

Performance

• vtbench: Benchmarking tool
• MySQL protocol performance improvements
• Faster reparents
• Parallelized backups (4X faster)
• Snappier InitShardMaster and PlannedReparentShard
• Improved coordination with Orchestrator

New MySQL versions support

• MySQL 8.0 and MariaDB 10.3

Build

• Pure Go 1.11. You can now build with CGO_ENABLED=0.

Resharding and VReplication

• ShowResharding
• CancelResharding
• Safer MigrateServedTypes
• Auto-reverse direction of MigrateServedTypes to allow rollback of a previous MigrateServedTypes
• Workflow SplitDiff parallelized across shards
• SplitClone uses destination master for comparison