CA2242833A1 - Parallel file system and method using tokens and metadata nodes - Google Patents

Parallel file system and method using tokens and metadata nodes

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Publication number
CA2242833A1
CA2242833A1 CA002242833A CA2242833A CA2242833A1 CA 2242833 A1 CA2242833 A1 CA 2242833A1 CA 002242833 A CA002242833 A CA 002242833A CA 2242833 A CA2242833 A CA 2242833A CA 2242833 A1 CA2242833 A1 CA 2242833A1
Authority
CA
Canada
Prior art keywords
file
file system
parallel
metadata
tokens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002242833A
Other languages
French (fr)
Other versions
CA2242833C (en
Inventor
Frank B. Schmuck
Radha R. Kandadai
Anthony J. Zlotek
Robert J. Curran
William A. Kish
Boaz Shmueli
James C. Wyllie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/893,723 external-priority patent/US5974424A/en
Priority claimed from US08/893,627 external-priority patent/US6021508A/en
Priority claimed from US08/893,725 external-priority patent/US5950199A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of CA2242833A1 publication Critical patent/CA2242833A1/en
Application granted granted Critical
Publication of CA2242833C publication Critical patent/CA2242833C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

A computer system having a shared disk file system running 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. Dynamic prefetch and cached balance pools for multiple accesses improve the system. Extended file attributes and attribute value sharing are used for implementation of access control lists in a parallel file system. A metadata node manages file metadata for parallel read and write actions. For our system, tokens are used for metadata node selection and identification. Enhanced token modes for controlling file size, as well as smart caching of byte range tokens using file access patterns and a byte range lock algorithm using a byte range token interface are provided. Locking techniques reduce the overhead of a token manager which is also used in the file system recovery if a computer participating in the management of shared disks becomes unavailable or failed. Synchronous and asynchronous takeover of a metadata node occurs for correction of metadata which was under modification. Locks are not constantly required to allocate new blocks on behalf of a user. Recoverable local shares for quota management are provided. 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.
CA002242833A 1997-07-11 1998-07-09 Parallel file system and method using tokens and metadata nodes Expired - Fee Related CA2242833C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US08/893,627 1997-07-11
US08/893,723 US5974424A (en) 1997-07-11 1997-07-11 Parallel file system and method with a metadata node
US08/893,725 1997-07-11
US08/893,627 US6021508A (en) 1997-07-11 1997-07-11 Parallel file system and method for independent metadata loggin
US08/893,723 1997-07-11
US08/893,725 US5950199A (en) 1997-07-11 1997-07-11 Parallel file system and method for granting byte range tokens

Publications (2)

Publication Number Publication Date
CA2242833A1 true CA2242833A1 (en) 1999-01-11
CA2242833C CA2242833C (en) 2004-09-07

Family

ID=27420549

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002242833A Expired - Fee Related CA2242833C (en) 1997-07-11 1998-07-09 Parallel file system and method using tokens and metadata nodes

Country Status (1)

Country Link
CA (1) CA2242833C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111930686A (en) * 2020-07-15 2020-11-13 杭州海康威视系统技术有限公司 Method and device for storing log and computer equipment
US11288396B2 (en) 2019-06-18 2022-03-29 International Business Machines Corporation Data security through physical separation of data

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9798695B2 (en) * 2012-08-07 2017-10-24 Nokia Technologies Oy Access control for wireless memory

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11288396B2 (en) 2019-06-18 2022-03-29 International Business Machines Corporation Data security through physical separation of data
CN111930686A (en) * 2020-07-15 2020-11-13 杭州海康威视系统技术有限公司 Method and device for storing log and computer equipment
CN111930686B (en) * 2020-07-15 2024-02-20 杭州海康威视系统技术有限公司 Method and device for storing logs and computer equipment

Also Published As

Publication number Publication date
CA2242833C (en) 2004-09-07

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Effective date: 20100709