TWeightedHashShardAllocator Class

IShardAllocator that allocates deterministically by hashing the tenant id over the active shards, weighted by their TShardInfo.Weight.

Remarks

The tenant id is hashed (FNV-1a) over the list of active shards expanded by their weight, so a shard with weight 2 receives roughly twice as many tenants as a shard with weight 1, and the same tenant id always maps to the same shard for a given shard configuration. This is the default allocator of TTenantProvisioner.

Syntax

Unit: Aurelius.Tenancy.Provisioning

TWeightedHashShardAllocator = class(TInterfacedObject, IShardAllocator);

Methods

Name	Description
AllocateShard	Returns the active shard selected by the weighted hash of the tenant id.