International Business Machines Corporation

Raymond Allen Bills

Atul S Kumar

Jerry Leroy Von Berge

Embodiments of the present invention are generally directed to a method, apparatus and system for journaling an object in a file system of a computer. In one aspect, a request to make a change on the object is received. In response, a journal entry containing a set of information regarding the change is generated. The journal entry is then stored to a journal. A determination is made as to whether the object contains an indicator indicating to a journal file system to bypass storing the change to the object. If so, the journal file system bypasses storing the change to the object if the object contains the indicator.

Method for efficient recording and management of data changes to an object

A system and method for automatic journaling of objects in a computer file system. A journal directory operation is caused when a new or existing object to be linked into a directory if the directory has an attribute indicating automatic journaling status. An operating system synchronization lock is acquired before the object is journaled to preserve the object from changes by the operating system, and held in place until after journaling has started.

Continuous journaling of objects within a hierarchical directory tree

A method and apparatus are provided for enhanced performance caching for path names. A vnode is built for a root directory and a path name is stored in a path cache for the vnode for the root directory. A second vnode is built for a second directory and a path name is stored in a path cache for the second vnode. When a next vnode is built for a next directory, then a path name is stored in a path cache for the next vnode. For a given vnode, the path name includes an entire path name that leads to the vnode. A given vnode is enabled to return its entire path name in one step, without reverse traversal.

Method and apparatus for enhanced performance caching for path names

A method and computer program product are provided for implementing datalink path protection. A datalink designation is created in the computer system and a datalink indicator is turned on. A corresponding datalink path for the datalink designation is stored in a predefined prefix table. The datalink indicator is used for processing a directory rename or remove operation.

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Rochester, MN, United States of America

Raymond Allen Bills