Distributed Database Architecture Questions

Covers principles and patterns for designing databases that span nodes and regions. Subjects include replication strategies synchronous and asynchronous, partitioning and sharding approaches, leader follower and multi leader architectures, consensus mechanisms and their trade offs, consistency models including eventual consistency and strong consistency, cross region failover and disaster recovery, indexing and query routing in partitioned systems, transactional semantics and distributed transactions, and operational concerns such as backup, schema evolution, and performance tuning for distributed data stores.