Concurrent virtual tape usage

摘要

A request to access a virtual tape volume is identified and a lock status is maintained for the virtual tape volume. The lock status includes a shared status and an exclusive lock status. In shared status, it is determined whether the request includes a request for write access to the virtual tape volume. Concurrent access to the virtual tape volume can be allowed by two or more applications during the shared status based at least in part on whether the applications request for write access to the virtual tape volume.

主权项

1. A method comprising:
setting a status of a particular virtual tape volume to a shared status, wherein the particular virtual tape volume is one of a plurality of tape volumes comprising virtual tape volumes and physical tape volumes, each of the plurality of tape volumes is referenced in a system by a respective unique volume serial number (VOLSER), and the particular virtual tape volume is referenced in the system by a particular VOLSER; identifying a request to access the particular virtual tape volume; determining a type of access to the particular virtual tape volume; and determining a lock status for the particular virtual tape volume, wherein the lock status is to be transitioned to an exclusive lock for requests for write access of the particular virtual tape volume, shared status is to be retained for requests for read-only access of the particular virtual tape volume, concurrent access to the particular virtual tape volume by two or more applications can be permitted during the shared status, and each of the two or more applications addresses the particular virtual tape volume by the particular VOLSER during the concurrent access.