Patent ID: 7409497
Filing Date: 2008-08-05
Classification: G06F

Abstract:
1. A method for efficiently guaranteeing data consistency to clients for one or more data containers stored on a plurality of volumes configured as a striped volume set, comprising: providing one or more data volumes configured to store data content of the data containers stored on the striped volume set; for each data container stored on the striped volume set, designating one volume as a container attribute volume configured to store rapidly-changing attribute meta-data associated with that container; issuing, by the container attribute volume, a ticket book having a plurality of permitted modification times (mtimes) to a selected data volume, the mtimes to be transmitted to a client by the selected data volume in response to a request from the client for an I/O operation on data stored in the selected data volume; and performing, in response to an mtime returned to a client, an atomic I/O operation by the data volume.