IP Library › Granted Patent US 7,593,968
Granted Patent B2
US 7,593,968 · App. 10/345,357 · Granted Sep 22, 2009

Recovery and relocation of a distributed name service in a cluster filesystem

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Quick Facts
Patent No.
US 7,593,968
App. No.
10/345,357
Granted
Sep 22, 2009
Kind
B2
Abstract

A cluster of computer system nodes share direct read/write access to storage devices via a storage area network using a cluster filesystem. During relocation of a server for a distributed name service and recovery of a cluster, entries related to the distributed name service for filesystems is updated. During relocation, a new server for a filesystem informs all nodes in the cluster of the new server's location. During recovery, a process executing on each node deletes entries related to the distributed name service for any filesystem that does not have a server in the recovering cluster.

Claims (12)

1. A method of administering a distributed name service for a cluster filesystem accessed by computer system nodes sharing direct read/write access to storage devices via a storage area network, comprising:

automatically updating entries related to a distributed name service stored on the computer system nodes upon one of relocation of a server for the cluster filesystem and recovery of a cluster if no node in the cluster provides the server for the cluster filesystem.

2. A method as recited in claim 1 , wherein said updating includes deleting the entries related to the distributed name service stored on the computer system nodes during recovery of the cluster if no node in the cluster provides the server for the cluster filesystem.

3. A method as recited in claim 2 , wherein said deleting is performed by a process executing independently on each of the computer system nodes.

4. A method as recited in claim 1 , wherein said updating includes sending, during relocation of the cluster filesystem, location information of a new server for the cluster filesystem from the new server to the computer system nodes in the cluster.

5. A method of automatically recovering a cluster filesystem accessed by computer system nodes sharing direct read/write access to storage devices via a storage area network, comprising:

executing a process on each of the computer system nodes in a recovering cluster to delete entries related to a distributed name service for any filesystem for which no server is provided by any of the computer system nodes in the recovering cluster.

6. A method of relocating a server of a filesystem in a cluster filesystem accessed by computer system nodes sharing direct read/write access to storage devices via a storage area network, comprising:

sending, during relocation of the cluster filesystem, location information of a new server for the filesystem in a message to the computer system nodes from one of a previous server for the filesystem and the new server for the filesystem.

7. A method as recited in claim 6 ,

wherein the new server is provided by one of the computer system nodes, and

wherein said sending sends the location information to at least all of the computer system nodes which do not provide the new server.

Assignments (13)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 4, 2017
From: SILICON GRAPHICS INTERNATIONAL CORP.
To: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
Reel/Frame 044128/0149 →
RELEASE OF SECURITY INTEREST Recorded Nov 2, 2016
From: MORGAN STANLEY SENIOR FUNDING, INC., AS AGENT
To: SILICON GRAPHICS INTERNATIONAL CORP.
Reel/Frame 040545/0362 →
ORDER. . . AUTHORIZING THE SALE OF ALL OR SUBSTANTIALLY ALL OF THE ASSETS OF THE DEBTORS FREE AND CLEAR OF ALL LIENS, CLAIMS, ENCUMBRANCES, AND INTERESTS. Recorded Jul 25, 2016
From: WELLS FARGO FOOTHILL CAPITAL, INC.
To: SILICON GRAPHICS INC.
Reel/Frame 039461/0418 →
ORDER. . .AUTHORIZING THE SALE OF ALL OR SUBSTANTIALLY ALL OF THE ASSETS OF THE DEBTORS FREE AND CLEAR OF ALL LIENS, CLAIMS, ENCUMBRANCES, AND INTERESTS. Recorded Jul 25, 2016
From: MORGAN STANLEY & CO., INCORPORATED
To: SILICON GRAPHICS, INC.
Reel/Frame 039461/0713 →
SECURITY INTEREST Recorded Mar 13, 2015
From: SILICON GRAPHICS INTERNATIONAL CORP.
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 035200/0722 →
MERGER Recorded Apr 15, 2014
From: SGI INTERNATIONAL, INC.
To: SILICON GRAPHICS INTERNATIONAL CORP.
Reel/Frame 032676/0282 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 15, 2014
From: SILICON GRAPHICS, INC.
To: SILICON GRAPHICS INTERNATIONAL, INC.
Reel/Frame 032675/0608 →
CHANGE OF NAME Recorded Apr 15, 2014
From: SILICON GRAPHICS INTERNATIONAL, INC.
To: SGI INTERNATIONAL, INC.
Reel/Frame 032693/0529 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 21, 2012
From: SILICON GRAPHICS, INC. ET AL.; SGI INTERNATIONAL, INC.
To: SILICON GRAPHICS INTERNATIONAL, CORP.
Reel/Frame 027904/0315 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 18, 2007
From: GENERAL ELECTRIC CAPITAL CORPORATION
To: MORGAN STANLEY & CO., INCORPORATED
Reel/Frame 019995/0895 →
SECURITY INTEREST Recorded Oct 24, 2006
From: SILICON GRAPHICS, INC.
To: GENERAL ELECTRIC CAPITAL CORPORATION
Reel/Frame 018545/0777 →
SECURITY AGREEMENT Recorded Aug 19, 2005
From: SILICON GRAPHICS, INC. AND SILICON GRAPHICS FEDERAL, INC. (EACH A DELAWARE CORPORATION)
To: WELLS FARGO FOOTHILL CAPITAL, INC.
Reel/Frame 016871/0809 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 16, 2003
From: BECK, KENNETH S.
To: SILICON GRAPHICS, INC.
Reel/Frame 013672/0132 →