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Scalable Database | VoltDB
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VoltDB / Product  / Features and Benefits / Scalability and Clustering

Scalability and Clustering

VoltDB automatically partitions your data across your cluster, keeping multiple copies of all data to ensure high-availability and data safety.

  • VoltDB scales partitionable transactions linearly with cluster size, up to millions per second.
  • Unlike many clustered systems, VoltDB also supports full cross-partition, multi-round transactions.
  • VoltDB can run up to tens of thousands of cross-partition read transactions per second and thousands of cross-partition write transactions.
  • VoltDB is robust to node failures and network partitions and is designed to run at full speed with failed or rejoining nodes.

VoltDB was designed from day one as a shared-nothing, cluster-native, relational database.

  • All nodes are the same; no leader or coordinator nodes.
  • Send work to any node and it will be routed appropriately.
  • No difference in functionality between single-node and clustered operation.
  • One system to manage with unified monitoring and statistics.
  • Read more about streamlined operations and TCO benefits.

VoltDB is focused on scalability and efficiency.

  • Hundreds of thousands of ACID transactions per node.
  • Millions of TPS on as few as three nodes.
  • Each transaction can contain many SQL statements; run millions of write-heavy SQL statements per second on a single node.
  • Read more about hardware efficiency.

As a result:

  • Customers are primarily sizing clusters for data size and for desired redundancy levels.
  • The most common cluster sizes are 3 nodes and 5 nodes, but many larger customers run 7 or 9 nodes per cluster.
  • Our largest production cluster is about 60 nodes and we test clusters up to 100 nodes. We leave 1000 node headaches to less efficient systems.
  • VoltDB does support multi-cluster replication, and many of our users have several small cluster working together across the world.

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