Red Hat, Inc.

Shishir Nagaraja Gowda

Anand Vishweswaran Avati

Amar Tumballi Suryanarayan

Doug Williams

A processing device receives a request for access to a source file that is stored in an initial location in a file system. The processing device determines that the source file is associated with a migration to a new location. The processing device reads the source file from the initial location if the request is a read request and writes to the source file at the initial location and writes to a destination file at the new location if the request is a write request.

Open file rebalance

A management process coordinates a number of servers to create a crash-consistent distributed snapshot. The management process instructs the servers to enter an ambiguity mode in which acknowledgement of barrier operations is delayed, instructs the servers to generate portion snapshots, and instructs the servers to exit the ambiguity mode and acknowledge barrier operations.

Distributed coordinated snapshots

File link migration is described. A method may include identifying a first file link referencing a file residing at a first computer system, and identifying, at the first computer system, a first inode data structure referenced by the first file link, the first inode data structure comprising a first link count. The method may also include creating a second inode data structure at a second computer system, wherein the second data structure comprises a second link count, and creating a second file link to reference the second inode data structure at the second computer system. The method may also include, responsive to determining that the first link count matches the second link count, migrating file data referenced by the first data structure to the second computer system.

File link migration

A first server hosted on a computer system identifies a set of file links in the first server that is associated with one or more hard links that point to file data for a file in the first server. The computer system migrates the set of files links for the file to a second server prior to migrating the file data for the file in the first server to the second server. The second server is hosted by a second computer system. The first computer system migrates the file data for the file in the first server to the second server when the migration of the set of file links for the file to the second server is complete.

Growing community of inventors

Karnataka, India

Shishir Nagaraja Gowda