Invention Grant
- Patent Title: Concurrent directory update in a cluster file system
- Patent Title (中): 集群文件系统中的并发目录更新
-
Application No.: US11776092Application Date: 2007-07-11
-
Publication No.: US08156164B2Publication Date: 2012-04-10
- Inventor: Owen T. Anderson , Frank B. Schmuck
- Applicant: Owen T. Anderson , Frank B. Schmuck
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Matthew W. Baca; Amy J. Pattillo
- Main IPC: G06F17/30
- IPC: G06F17/30

Abstract:
A method for avoiding directory conflicts across a file system having multiple nodes with one node representing a token manager. For each directory, at least one metanode responsible for directory updates. The method involving obtaining a name-based lock on a filename. Querying the token manager for a lock token. If a new token is obtained, sending a Remote Procedure Call (RPC) to the metanode to obtain matching directory entries, and caching the result of the RPC so that subsequent operations on that filename can be satisfied without additional messages sent to the metanode. Updating a cached directory block in memory by creating a new directory entry in the block or deleting an existing directory entry from the block. Information regarding the updating is sent to the metanode on one of: periodic schedule, a subsequent synchronization event, or when the name-based lock token is revoked.
Public/Granted literature
- US20090019047A1 CONCURRENT DIRECTORY UPDATE IN A CLUSTER FILE SYSTEM Public/Granted day:2009-01-15
Information query