Add sharded multi-tenancy with database pooling#4211
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jeremydmiller merged 5 commits intomasterfrom Mar 27, 2026
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New ShardedTenancy ITenancy implementation that: - Distributes tenants across a pool of databases (mt_database_pool) - Tracks tenant-to-database assignments (mt_tenant_assignments) - Creates native PG LIST partitions per tenant within each database - Supports 3 assignment strategies: hash, smallest, explicit - Uses advisory locks for concurrent-safe tenant assignment - Provides admin API (AddTenantToShardAsync, AddDatabaseToPoolAsync, etc.) Weasel abstractions (ITenantDatabasePool, ITenantAssignmentStrategy, IDatabaseSizingStrategy) enable other CritterStack tools to manage tenants. 8/12 integration tests passing. Remaining 4 need schema migration ordering fix for partition table creation in shard databases. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Fixed schema cleanup: ensure public schema exists before dropping mt_ objects - Fixed MarkDatabaseFullAsync: seed databases before marking full so the pool row exists when the UPDATE runs - Fixed findOrAssignTenantDatabaseAsync: seed databases before auto-assignment so the available database list is populated - All 128 MultiTenancyTests pass including existing managed partitioning, bucketed sharding, and master table tenancy tests Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New section in multitenancy.md covering: - Configuration with MultiTenantedWithShardedDatabases() - Three assignment strategies: hash, smallest, explicit (with custom) - Database registry tables (mt_database_pool, mt_tenant_assignments) - Admin API for runtime tenant/database management - Implicit vs explicit tenant assignment flow - Async daemon integration Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Revert ProjectReference to PackageReference for Weasel.Postgresql - Update Weasel.Postgresql and Weasel.EntityFrameworkCore to 8.11.0 - Remove lib/weasel submodule and .gitmodules - All 128 MultiTenancyTests pass (including 12 sharded tenancy tests) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- MD004: switch unordered lists from dashes to asterisks - MD060: add spaces in table separator rows for proper pipe spacing Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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The tests all pass locally, we've got some kind of hopefully temporary Docker issue on GH actions |
This was referenced Mar 30, 2026
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Summary
ShardedTenancyITenancy implementation for extreme scalability (targeting 200B+ events)mt_database_pool,mt_tenant_assignments) in master databaseAddTenantToShardAsync,AddDatabaseToPoolAsync,MarkDatabaseFullAsyncMultiTenantedWithShardedDatabases()docs/configuration/multitenancy.mdTest plan
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