Managing global cache coherency in a distributed shared caching for clustered file systems

Patent metadata

Field	Value
Publication number	US-8996591-B2
Application number	US-201314132956-A
Country	US
Kind code	B2
Filing date	Dec 18, 2013
Priority date	Aug 25, 2008
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Systems. Methods, and Computer Program Products are provided for managing a global cache coherency in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents.

First claim

The invention claimed is:

1. A method for managing global cache coherency in a distributed shared caching for clustered file systems (CFS) in a computing environment, the method comprising:
providing the CFS for residing on a cluster of nodes for accessing space of data segments that are shared between the cluster of nodes;
providing, in the CFS, a local cache memory of data segment slots on each of the cluster of nodes and a distributed shared memory (DSM) module, with no inter…

Assignees

• IBM

Inventors

• Aronovich Lior
• Toaff Yair
• Paz Gil
• Asher Ron

Classifications

• G06F17/3007

  Physics · mapped topic

• G06F12/084

  Physics · mapped topic

• G06F17/30227

  Physics · mapped topic

• G06F17/30132

  Physics · mapped topic

• G06F21/6218 Primary

  Physics · mapped topic