Data Systems⚪New

🌳 The Promises of Truth

Navigate the dangerous waters of distributed state, transactions, and consensus.

⬇️ Foundation

The Quantum Observer (Schrödinger's Database)

A mechanism to group several reads and writes into a logical unit.

The assumption that in a distributed system, packets will be lost, clocks will drift, and nodes will pause.

The problem of getting several nodes to agree on something (e.g., who is the leader) in an unreliable network.

The difficulty of ordering events in a distributed system due to clock drift.

Stop-the-world events (like Garbage Collection) that cause a node to stop responding for seconds.

A consistency model that ensures operations that are causally related are seen by every node in the same order.

The strongest consistency model: ensuring the system behaves as if there is only one copy of the data and all operations are atomic.

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🤔 Reflection:

"Why is 'Linearizability' expensive? Explain why a system cannot be both Linearizable and Available during a network partition (CAP Theorem)."