International Business Machines Corporation

Sap Ag

Laurent Dufour

Khalid Filali-Adib

David W Sheffield

Stephen Bailey Peckham

Frederic Barrat

Sungjin Yook

Perinkulam I Ganesh

Marc Philippe Vertes

John Mark McConaughy

Marc Joel Stephenson

Nathaniel S Tomsic

Philippe Bergheaud

Christophe Lombard

Luke Mathew Browning

Donald Ray Stence

Guy Menanteau

J Mark McConaughy

Christine M Briand

Kavitha Ramalingam

Balamurugan Ramajeyam

Gregory Kurz

Francois Richard

Cedric Le Goater

Mechanisms are provided for performing a live update of an operating system. The mechanisms receive an update to an operating system and clone a root volume group associated with an operating system instance executing in a first logical partition of the data processing system to generate a cloned root volume group. The mechanisms apply the update to the cloned root volume group to generate an updated and cloned root volume group and boot a second logical partition of the data processing system using the updated and cloned root volume group. Moreover, the mechanisms migrate application instances and application data to the second logical partition.

Live operating system update mechanisms

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.

When moving workload partitions (WPARs) from machine to machine, operating systems may encounter errors that prevent successful WPAR migration. Recording and reporting errors can be challenging. To move WPARs, the operating system may employ a plurality of software components, such as code residing in user space (e.g., application programs, OS libraries, and shell scripts), code residing in the operating system's kernel, and code residing on remote machines. Embodiments of the invention include a framework that enables all the software components to record errors. The framework can also report the errors to users and processes.

Error handling in a virtualized operating system

This invention relates to a method for dynamic insertion of a computer code processing within a running computer task in a transparent fashion for this target task. It also relates to a method using such a dynamic insertion in order to execute a multi-task application in a virtual container forming a virtualized environment session. This method comprises the following steps of storing by a manager task of a hooking datum representing the code processing to be inserted; executing, within the execution of a system routine called by the target task, a hooking instruction initiating a test of the hooking datum; and executing the inserted code, according to the result of said test and instead of the program instruction following the hooking instruction in the execution of said system routine.

Method for executing an application in a virtual container forming a virtualized environment session

Disclosed is a method for replicating a software application in a multi-computer architecture (cluster). The software application is executed on a first computer of the cluster, which represents a primary or operation node, and is replicated on at least one other computer of the cluster, which represents a secondary node, including replication of the resources associated with the software application. The method includes streamlined updating of the replicated resources via a dynamic introspection mechanism supplying the structure of the application that is to be replicated and the dynamic graph of the implemented resources and dependencies.

Functional continuity by replicating a software application in a multi-computer architecture

A method for carrying out a connection migration in a multicomputing architecture (cluster), from a first node which is called a primary node or operation node, including a first computer of the cluster on which an initial software application is run, towards at lest one secondary node including another computer of the cluster. The method implements a virtual network address which is carried by the first computer and transferred to the other computer, the virtual network address being embodied in the form of a dialogue link between the cluster and client computers connected thereto and associated with the software application. The associated connections can, for example be associated with a software application which is replicated in another computer in such a way that the initial application service is switched to the replica thereof.

Migration method for software application in a multi-computing architecture, method for carrying out functional continuity implementing said migration method and multi-computing system provided therewith

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Plaisance du Touch, France

Laurent Dufour