Client side caching in a global file system

Details Client side caching in a global file system Client side caching in a global file system

2011-01-11

2011-01-11

Ali, Mohammad (Department: 2158)

Data processing: database and file management or data structures

Data integrity

Policy, rule-based management of records, files, and documents

C707S966000, C709S201000, C709S202000, C709S222000

Reexamination Certificate

active

07870106

ABSTRACT:
Client node caching in a global file service. A client node receives a leaf image from a remote storage node storing a base image that is read-only accessible to the client node. The leaf image has a portion of the base image modified by the client node. The client node stores the leaf image in a cache on the client node. Unmodified portions of the base image are accessed from the remote storage node. Modified portions of the base image are accessed from the cache. The leaf images may comprise a branch modification log having portions of the base image modified by the client node and a metadata structure. The metadata structure has pointers to the modified data in the branch modification log and pointers to data unmodified by the client node in the base image. Alternatively, the leaf images may comprise a change volume for changes made to the base image by the client node.

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