International Business Machines Corporation

Steven Lawrence Dobbelstein

Steven Michael French

Steven L Pratt

Luciano Chavez, Jr

Embodiments relate to diagnostic evaluation of hardware components of a computer machine. A conventional storage device is replaced with a modified storage device. Read and write operations are received by the modified storage device. Issuance of a response to the read and write operations is limited to an acknowledgement receipt, which is employed to evaluate performance and/or bandwidth of the machines with respect to hardware for data storage.

Quasi disk drive for testing disk interface performance

Embodiments of the invention relate to diagnostic evaluation of hardware components of a computer machine. A conventional storage device is replaced with a modified storage device. Read and write operations are received by the modified storage device. Issuance of a response to the read and write operations is limited to an acknowledgement receipt, which is employed to evaluate performance and/or bandwidth of the machines with respect to hardware for data storage.

A method and apparatus for configuring a server in a distributed data processing system is provided. The server receives a request for a function that specifies a first server name and a second server name. The server responds to requests directed to a set of server names that includes the first server name. The function executes on the server specified by the first server name, wherein the function dynamically modifies a membership of the second server name in the set of server names. The server names for the server are added or removed dynamically without halting or restarting the server.

Method and system for dynamic addition and removal of multiple network names on a single server

An apparatus and method is disclosed for aggregating API calls within a higher level Batch Submission API (BSA) having a sender BSA (SBSA) and a receiver BSA (RBSA). Specifically, one or more directory limit records needed for the restoration process on a particular server are grouped by the SBSA into one large buffer. The SBSA validates batch records prior to transmitting them to a receiver. The SBSA does not transmit the records if either (1) all of the records fail pre-submission validation or (2) a certain percentage of the records fail pre-submission validation. Once the SBSA has performed the pre-submission validation of the records, a buffer and count (BC) is transmitted to a receiver BSA (RBSA) at a second computer. The BC contains records passing pre-submission validation checks and a count of the records contained within the buffer. The RBSA would then process each of the directory limits records contained in the buffer at the second computer.

Batch submission API

A method and system for identifying a server in a distributed data processing system is provided. A primary server name and a secondary server name for the server are registered. The server is able to respond to requests directed to either the primary server name or the secondary server name. A plurality of secondary server names may be registered. The primary server name and the secondary server name may be stored in a configuration file or an initialization file. The primary server name or the secondary server name may be registered with a call to a NetBIOS application programming interface.

Method and system for multiple network names of a single server

Multiple users are emulated in a network environment by means of a multithreaded process in a client workstation. A plurality of client threads and associated network request queues are provided. Each client thread emulates a user in the network environment. A series of network requests is to a first network request queue associated with a first client thread. A harvester thread receives network traffic from a network application such as a redirector in the client workstation. The harvester filters the network traffic to assemble network requests and corresponding network responses. Once assembled, the network requests and network responses are placed in the first network request queue. Each of the series of network requests to a server in the network environment by the first client thread. The first client thread sequentially send each of the series of network requests to a next network request queue as each of the series of network requests are sent to the server. The process continues with each of the plurality of threads sequentially sending the network requests to the server and sequentially sending the network request to the next network request queue so that a plurality of users are emulated.

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Austin, TX, United States of America

Steven Lawrence Dobbelstein