Operation management method for distributed ledger system, operation management system for distributed ledger system, and operation management program for distributed ledger system

An operation management system for a distributed ledger system, comprising a first distributed ledger node in the distributed ledger system, configured to:

• copy data to a distributed ledger included in the first distributed ledger node from a distributed ledger included in a second distributed ledger node group when a content of the distributed ledger held by the first distributed ledger node is less than a content of the distributed ledger held by the second distributed ledger node group;
• and
• determine a second distributed ledger node group serving as a copy source, and a copy location in a distributed ledger in each distributed ledger node included in the second distributed ledger node group in the distributed ledger system, based on predetermined criteria for a predetermined attribute related to the distributed ledger node.

An operation management program for a distributed ledger system causing a first distributed ledger node in the distributed ledger system to execute a process, wherein

• the first distributed ledger node is configured to copy data to a distributed ledger included in the first distributed ledger node from a distributed ledger included in a second distributed ledger node group when a content of the distributed ledger held by the first distributed ledger node is less than a content of the distributed ledger held by the second distributed ledger node group, and
• the process is configured to determine a second distributed ledger node group serving as a copy source, and a copy location in a distributed ledger in each distributed ledger node included in the second distributed ledger node group in the distributed ledger system, based on predetermined criteria for a predetermined attribute related to the distributed ledger node.