If you truly cannot afford the $35, most public libraries offer free access to the O'Reilly Learning platform (formerly Safari Books), where System Design Interview Volume 2 is available legally in full-text PDF.

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Good luck. Design idempotently.

Focus heavily on specific components like database partitioning, data synchronization, cache eviction policies, or consensus algorithms.

Designing high-concurrency ledger systems with strict ACID compliance.

Routing algorithms, graph partitioning, and managing massive geospatial datasets.

Breaks down SMTP, IMAP, storage optimization for billions of small text files, and search indexing.

⚠️ from the author or publisher (ByteByteGo). GitHub repos do not legally host the full PDF. Any such PDFs are pirated copies.

Which from Volume 2 are you most interested in designing? Share public link