Title :
Device Locks: mutual exclusion for storage area networks
Author :
Preslan, Kenneth W. ; Soltis, Steven R. ; Sabol, Christopher J. ; O´Keefe, M.T. ; Houlder, Gerry ; Coomes, Jim
Author_Institution :
Parallel Comput. Syst. Lab., Minnesota Univ., MN, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
Device Locks are mechanisms used in distributed environments to facilitate mutual exclusion of shared resources. They can further be used to maintain coherence of data that is cached in several locations. The locks are implemented on the storage devices and accessed with the SCSI device lock command, Dlock. The paper presents the Dlock command and discusses how it can be used as a mutual exclusion device for storage area networks and shared disk file systems. Methods for the recovery of a Dlock held by a failed initiator are also presented. The Dlock command is in the process of being standardized as part of the SCSI 3 specification
Keywords :
cache storage; concurrency control; peripheral interfaces; shared memory systems; system recovery; Device Locks; Dlock command; SCSI 3 specification; SCSI device lock command; data coherence; distributed environments; failed initiator; mutual exclusion; shared disk file systems; shared resources; storage area networks; storage devices; Concurrent computing; Current measurement; Distributed computing; File systems; Laboratories; Laser mode locking; Load management; Protection; Storage area networks; Testing;
Conference_Titel :
Mass Storage Systems, 1999. 16th IEEE Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7695-0204-0
DOI :
10.1109/MASS.1999.830062
