LOCK ELEVATION IN A DISTRIBUTED FILE STORAGE SYSTEM

摘要

A client requests access to a resource (e.g., a file) via a node of a storage system. The resource is stored in a directory structure. A directory in the directory structure that includes the resource and that does not have any locks that conflict with the requested access to the resource is identified and selected. A revocable access privilege (e.g., a lock) on the selected directory is awarded to the node accessed by the client, and a directory-to-node association is established. Another association between the requested resource and the node is also established. If there is a subsequent request for the resource or for another resource within that directory, then a revoke notice for the directory access privilege is sent to the node.

主权项

1. A method, comprising:
receiving information that indicates a first client is requesting access to a first resource via a node of a storage system comprising a plurality of nodes, wherein said first resource is stored in a directory structure comprising a hierarchy of directories; identifying a first directory in said hierarchy that includes said first resource and that has no locks associated therewith that conflict with said access to said first resource; and associating a first lock with said first directory and with said node, and associating said first resource with said node.