Edit this pageDocumentationFAQShardingSharding Documentation Documentationv24.0 (Stable) Overview Get Started Concepts User Guides Reference v25.0 (Development) Overview Get Started Concepts User Guides Reference Troubleshoot Elevated query latency on primary Primary starts up read-only Vitess sees the wrong tablet as primary FAQ Getting Started Overview Migrating Operating Vitess Troubleshooting Sharding Advanced Configuration Learning Resources v23.0 (Stable) Overview Get Started Concepts User Guides Reference Contribute GitHub Workflow Sample First Issue Coding Standards PR Naming Conventions Build on Ubuntu/Debian Build on macOS Build on CentOS Parser and AST Roadmap Design Docs Query Serving Online DDL VReplication VTTablet Miscellaneous Archives Older Version Docs v22.0 (Archived) v21.0 (Archived) v20.0 (Archived) 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?