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Fail-stop means a system stops and stays down, while fail-recover means it can come back but needs to be ready.

High Availability ensures your application remains operational even during server failures.

Dynamo-style databases are designed for high availability and fault tolerance in distributed systems.

Active-passive architecture ensures a standby system takes over if the main system fails.

Fault domains help prevent multiple servers from failing together in an architecture.

Failover ensures systems remain operational by managing leader changes during failures.

Availability Zones help prevent downtime by isolating failures across multiple locations.

N+1 redundancy means having one extra server to maintain capacity during a failure.

Active-Active Architecture uses multiple regions to serve traffic simultaneously for better resilience.

Availability is about access; reliability is about correct performance.

Database replication helps keep data available and allows systems to handle more read requests.

Elasticsearch uses master election and quorum to prevent split brain scenarios.

Database replication enhances data availability and read performance but has challenges like replication lag.