Session State Location Selector
Route session state storage to the right location — Client Session State (cookies, JWT, hidden fields, URL parameters), Server Session State (in-memory or Redis session store), or Database Session State (SQL/NoSQL session table) — based on six dimensions: bandwidth cost, security sensitivity, clustering and failover needs, responsiveness, cancellation requirements, and development effort. Use when designing session management for a new web application, debugging sticky-session or node-pinning scaling problems, deciding between JWT vs server session vs database session, choosing a shared session store for a clustered or elastic deployment, handling shopping carts, multi-step forms, auth context, or edit-in-progress across HTTP requests, or auditing for session bloat or unsigned client session state. Applies to stateless session design, distributed session architecture, and HTTP session management in any language or framework. Relevant keywords: session state, session storage, session location, sticky sessions, JWT vs session, shared session store, stateless session, session management, HTTP session, distributed session, session cookie, server session, database session, Redis session, node-pinning, session scaling, client-side session, server-side session, session bloat.
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What You'll Need
Source Book

Patterns of Enterprise Application Architecture
Martin Fowler, David Rice, Matthew Foemmel, Edward Hieatt, Robert Mee, Randy Stafford
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