With distributed architecture regarded as one of the benefits of NoSQL (or non-relational) databases, Amazon DocumentDB is filling a critical gap with a new multi-region capability dubbed “Global Clusters” by AWS. DocumentDB, like most AWS databases, previously supported multiple read replicas across several availability zones within a region.
AWS is now expanding these capabilities across geographies. While a single primary instance remains for writes, the Global Clusters functionality will support read-only secondary instances in up to five remote locations.
AWS identified two primary use cases for the new Global Clusters feature: disaster recovery, ensuring that the database remains operational during a region failure, and low-latency reads across multiple local regions spread around the globe.
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