International Business Machines Corporation

Vipul Paul

Vikas Ahluwalia

Scott Alan Piper

Sudhir Gurunandan Rao

Arun Batish

Manoj K Negi

Akulavenkatavara Prasadarao

Thomas M Carlier

Automated testing of software builds having updated signature required modules, such as plug and play devices, is facilitated. A build (e.g., a daily build) of the software is performed, which includes one or more updated signature required modules. These modules are included within the build, even though the modules are unsigned. Automated testing is then performed against the daily builds.

Facilitating the automated testing of daily builds of software

Systems and methods for managing a device in a distributed file system are provided. In one embodiment, the method comprises instantiating a physical device object, in response to a file system driver detecting a device remotely connected to a computing system via a distributed network. An operating system running on the computing device loads a disk function driver for managing access to the device. A plug and play manager of the operating system enumerates the device. The disk function driver instantiates and registers a functional device object with a mount manager of the operating system. A file system instantiates a volume device object for a logical drive volume mapped to the device and the mount manager mounts the volume device object on the functional device object.

Managing a device in a distributed file system, using plug and play

An apparatus, system, and method are disclosed for cache synchronization within a multi-tier system having multiple client-server relationships. The apparatus includes a pre-synchronization module, a locking module, and a synchronization module. The pre-synchronization module receives a pre-synchronization call from an upstream node coupled to a first downstream node. The locking module locks a first cache coupled to the first downstream node in response to a synchronization call from the upstream node. The synchronization module synchronizes source data on the upstream node with cached data on the first cache. The apparatus also may include a post-synchronization module to perform any necessary cleanup activities. Advantageously, the apparatus, system, and method reduce the likelihood of a system deadlock due to premature locking of the first downstream cache, which prevents a subsequent downstream cache from synchronizing with the first cache.

Apparatus, system, and method for cache synchronization

A method and system for maintaining integrity of metadata associated with a migrated file. Following migration of data from a source filesystem to a destination filesystem, a tool is automatically invoked to detect if there are any differences in metadata associated with the files and/or folders at each location. Each select field of the metadata at the source filesystem is reviewed to ensure that it matches with the equivalent field at the destination filesystem. In the event at least one of the reviewed metadata fields does not match, an error is generated and forwarded to an operator.

Method of verifying metadata of a migrated file

Memory allocation requests are satisfied from a memory pool or from lookaside lists, based on the memory size requested to be allocated. A method, for each of a number of future differently sized memory allocations, determines which memory allocations are to be satisfied from a lookaside list, and which memory allocations are to be satisfied from a memory pool. For each memory allocation to be satisfied from a lookaside list, a corresponding lookaside list for the allocation is initialized. A table is constructed that has a number of entries corresponding to all the differently sized memory allocations. Each entry corresponding to a memory allocation to be satisfied from a lookaside list points to the lookaside list for that memory allocation.

Growing community of inventors

Hillsboro, OR, United States of America

Vipul Paul