Group generation apparatus and group determination method

A group generation apparatus that determines a consistency group for providing consistency to replication processing from a first site including a plurality of volumes to a second site including a plurality of volumes, the group generation apparatus comprising:

• a group determination unit that forms one or more first groups that are groups of volumes at the first site based on a relationship of distributed transactions at the first site, forms one or more second groups that are groups of volumes at the second site based on a relationship of distributed transactions at the second site, specifies a correspondence relationship between the first group and the second group, and includes the first group and the second group that correspond to each other based on the specified correspondence relationship in the same consistency group, wherein
• the group determination unit creates undirected graphs in which a pod is a vertex and a write relationship for a volume is an edge, and classifies the undirected graphs that are not in a connection relationship into different first groups,
• the pod is connected to the volume, or the pod performs writing to another pod connected to the volume, and
• in order to create the undirected graphs, the group determination unit:
• reads source code related to all services in all local and remote pods, the source code storing write function calls regarding pods that are targets for write processing:
• analyzes the source code to specify all pods, all services, and all distributed transactions;
• and
• specifies a relationship of all distributed transactions and creates an association list with reference to the write function calls in the source code by searching for descriptions of the write function calls in the source code to specify transmission source pods and transmission destination pods in all writes between pods or services in each of the distributed transactions.