International Business Machines Corporation

Huawei Technologies Co., Limited

Emad Boctor

Andrew William Hilden

Yuk Kuen Chan

Huaxin Zhang

Ronen Grosman

Wenbin Ma

Ping Chen

Brad J Barclay

Hoi Ieng Lao

Darin C McBride

Lui Tang

Karen Jane Pihowich

Chaoyi Kuang

Igal Ziskind

A method and system for implementing concurrency control in a database system includes receiving a request from a node for handling by a GTM. Registering the request in a slot in a tracking array where each of the slots represents one of the requests for handling by the GTM. A slot is acquired, and a segment of the tracking array is scanned to determine a batch of pending requests. The batch is used to produce an aggregate request and the aggregate request includes an aggregate increment of a total number of commit requests of the batch. The aggregate request is sent to the GTM using one of a plurality of pre-established connections. A response is received from the GTM that includes a current value of an incremented timestamp. The incremented timestamp is distributed to the requests of the batch and the lock is released.

Method and apparatus for distributed database transactions using global timestamping

The disclosed systems and methods are directed for detecting and resolving write-write conflicts among a plurality of transactions received from master nodes of a multi-writer database system. The method includes receiving a plurality of REDO logs and storing the plurality of REDO logs in a buffer, each REDO log associated with the one of the plurality of transactions, selecting one REDO log of the plurality of REDO logs; persisting the transaction associated with the one REDO log in a local storage when a write-write conflict is detected between the one REDO log and at least one other REDO log of the plurality of REDO logs prior to committing the transaction associated with the one REDO log; and transmitting a status of the transaction associated with the one REDO log to a global transaction manager (GTM).

Method and system for detecting and resolving a write conflict

A mechanism for switching between multiple copies of a software program on a computer system is provided. The mechanism includes detecting a plurality of copies of the software program on a computer system, receiving input selecting one of the detected plurality of copies of the software program to be a default copy, and determining whether the selected copy of the software program is a current default copy on the computer system. If the selected copy of the software program is not the current default copy on the computer system then, the mechanism further includes demoting the current default copy to be an alternate copy, and promoting the selected copy of the software program to be a next current default copy.

Switching between multiple versions of a software program

A data processing system, a data processing implemented system, and an article of manufacture for resizing an image. A removable features list is generated, and the generated removable features list identifies one or more removable features associated with the install image. A removable components list is generated, and the generated removable components list identifies one or more components associated with the one or more removable features. The generated removable features list and the generated removable components list are used to determine which files may be removed from the install image so that removal of one or more components does not impact features that are not to be removed.

Resizing an install image

The placement of trace points in software code being developed in a software development tool leads to the generation of trace point messages when the code is executed. These trace point messages are listened for by aspects of the software development tool. Responsive to receiving one of the trace point messages, the software development tool may write information to a trace file. Advantageously, the trace file is formatted using a standard markup language format, such as HTML. Consequently, the trace file is readily readable (including information-conveying formatting) by a standard, freely available web browser, rather than a proprietary tool.

Dynamic generation of program execution trace files in a standard markup language

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Toronto, Canada

Emad Boctor