Common storage management device and common storage management method

A method of managing a common storage for a system including the common storage and at least one computer connected with each other by a closed network, the at least one computer including one computer configured to communicate with an outside, the at least one computer storing a plurality of applications configured to communicate with each other, the plurality of applications being configured to write and read data in the common storage, the common storage having a plurality of storage spaces, the method comprising:

• managing a reservation and a release of a storage space of the plurality of storage spaces of the common storage in response to a request from the plurality of applications;
• and
• assigning a releasing priority to each storage space of the plurality of storage spaces of the common storage that is reserved and to the request,
• comparing the releasing priority of the request with a highest releasing priority among the releasing priorities assigned to the plurality of storage spaces, and
• instructing to release the storage space of the plurality of storage spaces with the highest releasing priority when the plurality of applications request to reserve the storage space for the data and free storage space is insufficient for reserving the storage space for the data and when the highest releasing priority among the releasing priorities assigned to the plurality of storage spaces is higher than the releasing priority of the request.

A common storage management device for a system including a common storage having a plurality of storage spaces and a plurality of electronic control devices connected with an in-vehicle network, each of the plurality of electronic control devices being configured to execute at least one application, the at least one application being configured to write and read data in the common storage, the common storage management device comprising:

• at least one processor configured to:
• manage a reservation and a release of a storage space of the plurality of storage spaces of the common storage in response to a request from the at least one application;
• and
• assign a releasing priority to each storage space of the plurality of storage spaces of the common storage that is reserved and to the request,
• compare the releasing priority of the request with a highest releasing priority among the releasing priorities assigned to the plurality of storage spaces, and
• instruct to release the storage space of the plurality of storage spaces with the highest releasing priority when the at least one application requests to reserve the storage space for the data and free storage space is insufficient for reserving the storage space for the data and when the highest releasing priority among the releasing priorities assigned to the plurality of storage spaces is higher than the releasing priority of the request.