International Business Machines Corporation

John Mark McConaughy

Khalid Filali-Adib

Gary Dale Williams

Kristin Marie Hazlewood

David W Sheffield

Frederic Barrat

Perinkulam I Ganesh

Sungjin Yook

Christophe Lombard

Steven T Pancoast

Marc Joel Stephenson

Stephen Bailey Peckham

Philippe Bergheaud

Luke Mathew Browning

Daw Feng

Laurent Dufour

Donald Ray Stence

Shevaun-Ann M Fontenot

Janet Roberts Callaway

Guy Menanteau

Joan M Thompson

Andy Hazlewood

Shaw-Ben Shi

John Ryan McGarvey

Trung Minh Tran

Kavitha Ramalingam

Debora Jean Byrne

Daniel J Coyle, Jr

Chin-Long Shu

Dan C Hargrove

A technique for verifying data structure consistency across computing environments includes computing a first signature for a data structure of an application subject to checkpointing corresponding to a first computing environment residing on a first computer. A second signature for the data structure of the application corresponding to a second computing environment residing on a second computer is computed. The first and second signatures are compared to determine whether a change to the data structure exists. Responsive to a lack of change to the data structure based on the comparison, a mobility operation is enabled for the application between the first computer and the second computer.

Verifying data structure consistency across computing environments

According to one aspect of the present disclosure, a method and technique for verifying data structure consistency across computing environments includes computing a first signature for a data structure of an application subject to checkpointing corresponding to a first computing environment residing on a server computer. A second signature for the data structure of the application corresponding to a second computing environment residing on a client computer is computed. The first and second signatures are compared to determine whether a change to the data structure exists. Responsive to a lack of change to the data structure based on the comparison, a mobility operation is enabled for the application between the server computer and the client computer.

According to one aspect of the present disclosure, a method and technique for verifying data structure consistency across computing environments is disclosed. The method includes: generating a first signature for a data structure corresponding to a first computing environment; generating a second signature for the data structure corresponding to a second computing environment; comparing the first and second signatures; and responsive to a disparity between the first and second signatures, indicating a change to the data structure between the first and second computing environments.

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

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 mirror the original root volume group associated with an operating system instance executing in a first logical partition and import the mirrored root volume group into the second logical partition. The mechanisms migrate application instances to the second logical partition by restarting the application instances in the second logical partition using the mirrored root volume group.

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

Replicating modifications of a directory that include receiving in a source directory service for a source directory requests for modifications in the source directory and transmitting, from the source directory service to a duplicate directory service for a duplicate directory asynchronously in parallel over a plurality of data communications connections, requests for the same modifications in the duplicate directory. In typical embodiments, a duplicate directory may replicate a subtree of a source directory, receiving requests for modifications may include receiving in the source directory service requests for modifications in the subtree in the source directory, and transmitting requests may include transmitting requests for the same modifications in the subtree in the duplicate directory.

Replicating modifications of a directory

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.

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

A versioned workload partition (WPAR) can be migrated from a source machine to a destination machine. Each thread associated with a process executing within the versioned WPAR is frozen. For each thread associated with the process, an error number associated with the thread is received in response to freezing execution of the thread and at least a current state of the thread is determined as checkpoint information associated with the thread based, at least in part, on the error number associated with the thread. The checkpoint information associated with the one or more threads is provided to the destination machine. The checkpoint information is used at the destination machine to reconstruct the process within a destination versioned WPAR on the destination machine.

Mobility of versioned workload partitions

A mechanism for providing proxy support for special subtree entries in a directory information tree by defining filters at the proxy level to indicate relationships between main subtree entries and associated special subtree entries. A proxy server receives a request from a client for a special subtree entry and determines whether the distinguished name of the main subtree entry can be built using information in the request and pre-defined relationships between the main subtree entry and the requested subtree entry. If so, the proxy server builds the distinguished name of the main subtree entry associated with the special subtree entry and applies a partitioning filter to the distinguished name of the main subtree entry to determine a target directory server in the plurality of backend directory servers that comprise the special subtree. The proxy server then sends the request to the target directory server.

Proxy support for special subtree entries in a directory information tree using attribute rules

A method, system, and computer usable program product for preserving references to deleted directory entries are provided in the illustrative embodiments. An instruction to delete an entry is received. A second entry referencing the entry is identified. The second entry is marked as a ghost reference to the entry. The entry is converted to a deleted entry. A ghost attribute with a value of 'false' may be added to the entry. A ghost attribute or tag with a value of 'false' may be added to the second entry. The ghost tag may correspond to an attribute of the second entry that references the entry. An entry may be deleted by setting a value of a ghost attribute in the entry to true. The second entry may be marked as the ghost reference by setting a value of a ghost attribute or a ghost tag in the second entry to true.

Preserving references to deleted directory entries

The illustrative embodiments provide for filtering LDAP requests and server responses. A viewport server is configured with filtering rules for responses from a directory server where the responses are generated to fulfill requests from a client application. The filtering rules determine which data is to be forwarded to the client application. One or more responses are intercepted from the directory server to the client application. The one or more intercepted responses are filtered according to the filtering rules to produce a set of filtered responses. The set of filtered responses are then sent to the client application.

Growing community of inventors

Austin, TX, United States of America

John Mark McConaughy