It operates in three layers: a data storage layer, a self-managed distribution layer, and a cluster-aware client layer. Īerospike uses hybrid memory architecture: the database indices are stored fully in main random-access memory, while the data is stored on a persistent device using the data layer. The data layer stores the data in solid-state drive, NVMe or Persistent memory. Reading the data is done using a direct access to the record position on disk using a direct pointer from the primary index, and data writes are optimized through large block writes to reduce latency. This architecture to fetch all records from the persistent device and void the use of data cache. Aerospike also provide the ability to be store the data fully in RAM thus acting as an in-memory database. In that case, data would be persisted to either SSD, NVMe, PMEM or traditional rotational media. Īerospike provides single-record ACID transactions. The distribution layer is responsible to replicate the data across nodes to ensure the durability and immediate consistency properties of the transaction. This allows the database to remain operational even when an individual server node fails or is manually removed from the cluster. Since version 4.0 (2018), Aerospike Database can be configured both as Available and Partition-tolerant (AP) or Consistent and Partition-tolerant (CP) under the CAP theorem.

The client cluster-aware layer is used to track the cluster configuration in the database, and manages client direct communications to all the nodes in the cluster. The clustering is done using heartbeats and Paxos based gossip protocol algorithm. The software employs two sub-programs that are codenamed Defragmenter and Evictor. Kitematic aerospike config file software# ^ a b 'Aerospike, the former Citrusleaf'.Defragmenter removes data blocks that have been deleted, and Evictor frees RAM space by removing references to expired records. ^ a b c d e f g h i j k l m n o p q r s 'Aerospike Release Notes'.^ 'Aerospike 4.0, Strong Consistency, and Jepsen'.^ a b 'What's New in Aerospike 3.13 and 3.14?'.Archived from the original on 24 December 2004. Kitematic aerospike config file license#.Kitematic aerospike config file software#.