International Business Machines Corporation

Marc Joel Stephenson

Khalid Filali-Adib

David W Sheffield

John Mark McConaughy

Stephen Bailey Peckham

Vinit Jain

Lance Warren Russell

David Jones Craft

Eric Philip Fried

Perinkulam I Ganesh

Dean J Burdick

Frederic Barrat

Sungjin Yook

Nathaniel S Tomsic

Laurent Dufour

Donald Ray Stence

Christine M Briand

J Mark McConaughy

Basu Vaidyanathan

Edward Shvartsman

Roji John

Gregory J Chaitin

Julie Levell Craft

Norman Edward Brake, Jr

Clifford H Hoagland

Provided are techniques for comparing a first fileset associated with a first operating system (OS) with a second fileset associated with a second OS; determining, based upon the comparing, that the second OS is a more current version of the first OS; in response to the determining that the second OS is a more current version of the first OS, moving, in conjunction with live application mobility, a virtual machine (VM) workload partition (WPAR) on the first LPAR to a second LPAR, the moving comprising determining a set of overlays associated with the WPAR corresponding to the second OS; removing from the WPAR any overlays associated with the first OS; applying to the WPAR a set of overlays corresponding to the second OS; check pointing processes associated with the WAPR; and copying live data associated with the LPAR from the first LPAR to the second LPAR.

Live application mobility from one operating system level to an updated operating system level and applying overlay files to the updated operating system

Provided are techniques for comparing a first fileset associated with a first operating system (OS) with a second fileset associated with a second OS; determining, based upon the comparing, that the second OS is a more current version of the first OS; in response to the determining that the second OS is a more current version of the first OS, moving, in conjunction with live application mobility, a virtual machine (VM) workload partition (WPAR) on the first LPAR to a second LPAR, the moving comprising determining a set of overlays associated with the WPAR corresponding to the second OS; removing from the WPAR any overlays associated with the first OS; applying to the WPAR a set of overlays corresponding to the second OS; check pointing processes associated with the WPAR; and copying live data associated with the LPAR from the first LPAR to the second LPAR.

A symbol resolution unit can be configured for resolving conflicting operating system symbols. A default symbol resolution data structure can be accessed to resolve a symbol associated with a client of an operating system. A first data entry that corresponds to the symbol is located in the default symbol resolution data structure. It is determined that the first data entry indicates that the symbol is marked special (e.g., as a conflicting operating system symbol). A secondary symbol resolution data structure is accessed in response to determining that the first data entry indicates that the symbol is marked special. A second data entry that corresponds to the symbol is located in the secondary symbol resolution data structure based, at least in part, on an identifier of the client. A memory location indicated in the second data entry that corresponds to the symbol is provided to the client.

Minimizing overhead in resolving operating system symbols

A computer implemented method, apparatus, and computer usable program code for managing a software partition in logical partitioned data processing system. A virtual root process is created for the software partition, wherein the virtual root process functions as a root process for the software partition. The set of child processes is re-parented to the virtual root process in response to termination of a process having a set of child processes.

Managing an application software partition

According to one aspect of the present disclosure, a method and technique for shared versioned workload partitions is disclosed. The method includes: creating, in a host machine running an instance of a first version of an operating system, a first workload partition associated with a second version of the operating system, the second version of the operating system comprising a different version of the operating system than the first version of the operating system; creating, in the logical partition, a second workload partition associated with the second version of the operating system; and hierarchically linking the second workload partition to the first workload partition to enable sharing of resources of the first workload partition by the second workload partition.

Shared versioned workload partitions

According to one aspect of the present disclosure a system and technique for shared versioned workload partitions is disclosed. The system includes a processor and logic executable by the processor to: create, in a host machine running an instance of a first version of an operating system, a first workload partition associated with a second version of the operating system, the second version of the operating system comprising a different version of the operating system than the first version of the operating system; create, in the logical partition, a second workload partition associated with the second version of the operating system; and hierarchically link the second workload partition to the first workload partition to enable sharing of resources of the first workload partition by the second workload partition.

An original file of a versioned WPAR, that is incompatible with a global operating system, can be persistently replaced with a corresponding replacement file that is compatible with the global operating system. For this, the original file can be renamed and a symbolic link file can be created to reference the replacement file instead of the original file. A software maintenance program can also be persistently replaced to preserve the replacement file and to maintain compatibility with the global operating system regardless of new instances of the original file delivered by the software maintenance program. The replacement file that corresponds to the original file can be identified and renamed. In response to detecting a new version of the original file, the new version of the original file can be renamed. A reference to the new version of the original file can be updated to reference the replacement file.

Persistent file replacement mechanism

An original file of a versioned WPAR, that are incompatible with a global operating system, can be persistently replaced with a corresponding replacement file that is compatible with the global operating system. For this, the original file can be renamed and a symbolic link file can be created to reference the replacement file instead of the original file. A software maintenance program can also be persistently replaced to preserve the replacement file and to maintain compatibility with the global operating system regardless of new instances of the original file delivered by the software maintenance program. The replacement file that corresponds to the original file can be identified and renamed. In response to detecting a new version of the original file, the new version of the original file can be renamed. A reference to the new version of the original file can be updated to reference the replacement file.

A workload partition, associated with a legacy operating system, is created on an instance of a base operating system implemented on a machine. The legacy operating system is an earlier version of the base operating system. An indication is detected to execute a first command associated with a process of the workload partition associated with the legacy operating system. It is determined that the first command associated with the process of the workload partition associated with the legacy operating system was overlaid with a reference to a runtime execution wrapper associated with the base operating system. The runtime execution wrapper is executed to access a runtime execution environment associated with the base operating system. The first command is executed using the runtime execution environment associated with the base operating system.

Implementing a versioned virtualized application runtime environment

Computer implemented methods, data processing systems and computer program products install deliverables into user-specified install locations. A user-specified install location is provided. Software virtual product data is extracted from a software bundle. Software virtual product data is stored within the user-specified install location.

User-specified install locations

A method and a computer program product that enable an existing operating system (OS) to provide a non-failure response to an application's reference to an OS service that is not currently defined/available within the existing OS. The loader of the OS responds to each reference to an undefined service by mapping the reference to an undefined service response utility (USRU). USRU is a specialized service designed to provide a response that a requested service is not yet available. When the OS loader detects that an application is referring to an OS service that is undefined, the OS loader resolves the reference to the USRU, which, when invoked returns an indication that the requested service is not yet available.

Method and computer program product for handling application references to undefined operating system services

A system for generating program object modules or decks of object code for selected computing systems is provided. The object module is generated from a conventional source program. The system has a compiler for generating an object module from the source program which module has the necessary instructions for executing the desired program in the selected computing system but these instructions are arranged in a first format which is not loadable or readable into the selected computing system. The present system has a converter for converting this first instruction format into a second instruction format which is loadable into the selected computing system. The present system is particularly advantageous when the instructions in the first format are arranged in an order unrelated to the function of the instructions in the object module while the instructions in the second or converted format are arranged in a plurality of sections, each of the sections containing instructions performing a related function in the program of the object module.

Growing community of inventors

Austin, TX, United States of America

Marc Joel Stephenson