International Business Machines Corporation

Paul David Mazzurana

Perinkulam I Ganesh

Sungjin Yook

Edward Shvartsman

Lance Warren Russell

Khalid Filali-Adib

Rodney Carlton Burnett

Kyusun Chang

Lon E Hall

Gregory Scott Joyce

Khalid Filali-Abid

A mechanism is provided for isolation of device namespace to allow duplicate or common names in root volume group workload partitions. The mechanism creates a scratch file system that contains enough information to create an execution environment for a workload partition and information about which physical volumes to use for the root volume group file systems. The mechanism then populates the root file systems on a disk in the global space. The mechanism boots the workload partition from the scratch file system and configures the devices to be exported to the workload partition based information in the scratch file system. The mechanism then renames the logical volume names to the traditional names. The mechanism then temporarily mounts the root volume group file system onto the scratch file system.

Isolation of device namespace to allow duplicate/common names in root volume group workload partitions

A method, system, and computer usable program product for isolating a workload partition space are provided in the illustrative embodiments. A boot process of a workload partition in a data processing system is started using a scratch file system, the scratch file system being in a global space. A portion of a storage device containing a file system for the workload partition is exported to the workload partition, the portion forming an exported disk. The partially booted up workload partition may discover the exported disk. The exporting causes an association between the global space and the exported disk to either not form, or sever. The exporting places the exported disk in a workload partition space associated with the workload partition. The boot process is transitioned to stop using the scratch file system and start using the data in the exported disk for continuing the boot process.

Isolating workload partition space

A computer implemented method, data processing system, and computer program product for maintaining state consistency among multiple state-driven file system entities when the file system entities become disconnected. Responsive to a distributed file system server being disconnected from a distributed file system client, a monitor is registered with the consistency management framework (CMF) for a file system. When the CMF detects access to a file in the file system, the CMF notifies the monitor of the access to the file, and the monitor stores information about state of the file. When the distributed file system server is reconnected to the distributed file system client, information about state of the file stored in the monitor is provided to the distributed file system client.

Method for maintaining state consistency among multiple state-driven file system entities when entities become disconnected

A common data link interface providing a framework for device drivers and data link providers. This interface allows multiple frameworks to coexist and share a single device driver. The common data link interface is framework independant and provides functions that are common to a plurality of frameworks. The common data link interface comprises three components, a network device driver, network demultiplexers, and network services. The network device driver provides a simple interface to network based devices that can be used by both the sockets IFNET and the streams DLPI data link layers. The network demultiplexor provides common data link receive functionality. Network services provides the remaining additional functionality required to bind the common data link interface together.

System for forwarding data packets with different formats to different

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Austin, TX, United States of America

Paul David Mazzurana