Management method for storage system and management system

A management system comprising:

• an interface device configured to communicate with a client that requests processing for any of a plurality of application programming interfaces (APIs) for a management operation on a storage system, via a communication network;
• a storage device configured to store management data;
• and
• a processor connected to the interface device and the storage device, wherein
• the management data includes required time history data,
• the required time history data is data in which, each time a management operation requested by one of the APIs is performed, a record including an actual measured length of time that is an actual measurement value of a required length of time for the management operation is accumulated,
• the processor is configured to
• receive, for a target API that is an API among the plurality of APIs for which parameters have been specified by the client, an operation request associated with the specified parameters,
• acquire a resource load of at least a hardware resource involved in an operation performed in response to the received operation request among hardware resources of the management system and/or the storage system,
• calculate an analytical predicted length of time by inputting at least some of the specified parameters and the acquired resource load to an analytical model that is a model of an ideal operation performed in response to the operation request for the target API, the analytical predicted length of time being a prediction value obtained by the analytical model for a required length of time for the operation performed in response to the received operation request,
• calculate a statistical predicted length of time by inputting the at least some of the parameters and the acquired resource load to a statistical model that is a model constructed on a basis of statistics of history of an operation performed in response to the operation request for the target API that are included in the required time history data, the statistical predicted length of time being a prediction value obtained by the statistical model for the required length of time for the operation performed in response to the received operation request, and
• determine a predicted length of time as a prediction value of the required length of time for the operation performed in response to the received operation request, on a basis of the analytical predicted length of time, the statistical predicted length of time, a weight of the analytical model, and a weight of the statistical model.