Ravi Sir's Cards › AWS
Per-tenant email
This interview card covers Per-tenant email. Global email PK collides across tenants. GSI PK=TENANT#tid SK=EMAIL#addr for uniqueness. Put two tenants same email , then both OK , then Query each.
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What this card says
What it is
Global email PK collides across tenants.
Why it matters
GSI PK=TENANT#tid SK=EMAIL#addr for uniqueness.
GSI
How / example
Put two tenants same email → both OK → Query each.
SaaS modeling.