Storage array reservation forwarding

摘要

A method is provided for a destination storage system to handle SCSI-3 reservations. The method includes discovering a volume on a source storage system when the source storage system exports the volume to the destination storage system, exporting the volume to host computer systems, locally registering keys for first paths to the destination storage system, and registering with the source storage system the keys for second paths to the source storage system. When one of the host computer systems requests to reserve the volume, the method includes locally reserving the volume for paths to the destination storage system with registered keys and performing reservation forwarding to request the source storage system to reserve the volume for paths to the source storage system with registered keys.

主权项

1. A method performed by a destination storage system comprising:
discovering a volume on a source storage system so the destination storage system is able to access the volume via the source storage system, the volume being already accessible to host computer systems via the source storage system; exporting the volume to the host computer systems so the host computer systems are able to simultaneously access the volume via the destination storage system and the source storage system; and while the host computer systems are able to simultaneously access the volume via the destination storage system and the source storage system, handle competing volume reservations by:
locally registering keys for first paths between the host computer systems and the destination storage system;registering with the source storage system the keys for second paths between virtual ports at the destination storage system and the source storage system; andwhen one of the host computer systems requests to reserve the volume:
locally reserving the volume for paths to the destination storage system having registered keys; andperforming reservation forwarding, comprising requesting the source storage system to reserve the volume for paths to the source storage system having registered keys.