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Amazon Neptune storage, reliability and availability - Amazon Neptune
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Amazon Neptune storage, reliability and availability

Amazon Neptune uses a distributed and shared storage architecture that scales automatically as your database storage needs grow.

Neptune data is stored in a cluster volume, which is a single, virtual volume that uses Non-Volatile Memory Express (NVMe) SSD-based drives. A cluster volume can grow to a maximum size of 128 tebibytes (TiB) (64 TiB in the China Regions and the Amazon GovCloud (US) Regions). A cluster volume consists of copies of the data across three Availability Zones (AZs) in a single Amazon Region, which provides high durability and availability.

The Storage section covers these topics in detail:

  • Allocation – You are charged for space allocated, as determined by the storage high water mark.

  • Storage billing – Storage costs are billed based on the high water mark, and Neptune also offers an I/O–Optimized pricing option for I/O–intensive workloads.

  • Reliability and high availability – Neptune replicates your data across three Availability Zones for high durability and automatic fault recovery.