Edit this pageDocumentationFAQShardingSharding Documentation Documentationv22.0 (Development) Overview Get Started Concepts User Guides Reference v21.0 (Stable) Overview Get Started Concepts User Guides Reference v20.0 (Stable) Overview Get Started Concepts User Guides Reference Learning Resources Contribute Build on macOS PR Naming Conventions Build on Ubuntu/Debian Build on CentOS GitHub Workflow Coding Standards Sample First Issue Parser and AST Troubleshoot Elevated query latency on primary Primary starts up read-only Vitess sees the wrong tablet as primary FAQ Getting Started Migrating Operating Vitess Troubleshooting Sharding Advanced Configuration Releases Release Cycle Release Team Release Notes Roadmap Design Docs Query Serving Online DDL VReplication VTTablet Miscellaneous Archives Older Version Docs v19.0 (Archived) v18.0 (Archived) v17.0 (Archived) v16.0 (Archived) v15.0 (Archived) v14.0 (Archived) v13.0 (Archived) v12.0 (Archived) v11.0 (Archived)OverviewWhy do auto-increment columns not work in sharded Vitess?What is resharding? How does it work?How are shards named?What does “/0” or “/-”mean?VReplicationHow can Movetables be used with duplicate table names?AdvancedHow can I know which shard contains a row for a table?Can I use Vitess to do cross-shard JOINs or Transactions?