Data processing: database and file management or data structures – Database design – Data structure types
Patent
1997-07-11
1999-08-31
Lintz, Paul R.
Data processing: database and file management or data structures
Database design
Data structure types
39520059, G06F 1516
Patent
active
059466863
ABSTRACT:
A computer system having a shared disk file system running on on multiple computers each having their own instance of an operating system and being coupled for parallel data sharing access to files residing on network attached shared disks. Methods are provided for use as a parallel file system in a shared disk environment by use of a scalable directory service for the system with a stable cursor, a segmented allocation map. Synchronous and asynchronous takeover of a metadata node occurs for correction of metadata which was under modification and a new computer node to be a metadata node for that file. Locks are not constantly required to allocate new blocks on behalf of a user. We have provided recoverable local shares for Quota Management. A quota server and a quota client are provided for each file system, and a quotacheck utility allows parallel environments with minimal interference to other applications which require the use of quotas.
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Curran Robert J.
Haskin Roger Lee
Schaller Sibylle
Schmuck Frank B.
Wyllie James Christopher
Augspurger Lynn L.
International Business Machines - Corporation
Lintz Paul R.
Shah Sanjiu
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