What is Weaviate's multi-tenancy feature?

Weaviate supports first-class multi-tenancy where each tenant has its own shard within a collection, giving strong data isolation and independent scaling per tenant. Tenants can be in three states: hot, loaded in memory for fast queries; warm, on disk and loadable on demand; or cold, offloaded to object storage for minimal cost. This lets SaaS platforms serve thousands of tenants with mixed usage patterns efficiently, activating only the tenants currently being queried. Multi-tenancy is enabled per collection at creation time.