International Business Machines Corporation

Brocade Communications Systems, Inc.

Amdahl Corporation

Brocade Communications, Inc.

Ronald K Kreuzenstein

Harry M Yudenfriend

David Darden Chambliss

John Glenn Thompson

James Alan Ruddy

Joshua W Knight

Alberto Poggesi

John J Lee

Elizabeth A Moore

Kreg A Martin

Gary A Woffinden

Gwynne L Roshon-Larsen

David C Banks

John Michael Terry

Ronald N Hilton

Nicholas C Matsakis

Gene M Amdahl

Donald L Hanson

Armando Palomar

A multi-mainframe system problem determination method includes receiving, in a first computing system, a data collection trigger, coordinating, in the first computing system, synchronized diagnostic data collection with a second computing system, and delivering the diagnostic data to a storage medium.

Problem determination in a hybrid environment

A multi-mainframe system problem determination method includes recording, in a first computing system, diagnostic data, receiving, in the first computing system, a data collection trigger, responsive to the data collection trigger, coordinating, in the first computing system, synchronized collection of recorded diagnostic data with a second computing system and delivering collected diagnostic data to a storage medium.

An I/O device operating according to a native computer architecture is accessed by a primary computer system operating according to a primary computer architecture. An application program of the primary computer system requests an I/O operation to access the I/O device. To facilitate this access, an application program interface formed of primary instructions for execution by the primary processor processes the I/O operation to provide an I/O request and to receive an interrupt in response to completion of the access. A thread is formed of primary instructions for execution by the primary processor for receiving the interrupt from the application program interface. A subsystem operates in response to the I/O request to access the I/O device and to provide the interrupt.

Controlling operations according to another system's architecture

A multi-mainframe operating system serialization method can include receiving, in a first computing system, a request to access a data set on behalf of a first peer application, sending, in the first computing system, a notification to a second peer application to obtain a normal enqueue, in response to the second peer application obtaining the normal enqueue, obtaining, in the first computing system, a first rider enqueue for the data set and sending, in the first computing system, a communication to peer instances to obtain additional rider enqueues for the data set, the additional rider enqueues corresponding to the first rider enqueue.

Serialization of access to data in multi-mainframe computing environments

A heterogeneous computing system includes a first server module having a first operating system, a second server module communicatively coupled to the first server module, the second server module having a second operating system dissimilar to the first operating system, a data set accessible by the first server module and the second server module; and a process residing on the first server module, the process configured to grant access to the second server module, from the first server module, to the data set.

Access control in a hybrid environment

In one embodiment, a system includes at least one outgoing transmission engine implemented in hardware, wherein the at least one outgoing transmission engine is for transmitting data in the plurality of buffers queued to the at least one outgoing transmission engine to the intersystem transmission medium, and a memory for storing the plurality of buffers, wherein each of the buffers queued to the at least one outgoing transmission engine is dequeued after the data is transmitted therefrom and requeued to an available buffer queue. In another embodiment, a system includes the above, except that it includes one or more incoming reception engines instead of outgoing transmission engines. In another embodiment, a method includes buffering data to be sent out by executing a loop of commands on an intersystem communication device and disconnecting the buffers after data has been transferred.

System for high-speed low-latency inter-system communications via channel-to-channel adapters or similar devices

A method and system for a decentralized distributed storage data system. A plurality of central processors each having a cache may be directly coupled to a shared set of data storage units. A high speed network may be used to communicate at a physical level between the central processors. A coherency protocol may be used to communicate at a logical level between the central processors.

Distributed shared I/O cache subsystem

A device that synchronizes circuits over asynchronous links is disclosed. Some embodiments of the invention include a device that comprises a plurality of circuits. One of the plurality of circuits is designated as a 'master' circuit. The master circuit is configured to send a first synchronization signal to one or more of the plurality of circuits, and each circuit that receives the first synchronization signal is configured to responsively send a second synchronization signal to one or more of the plurality of circuits.

Circuit synchronization over asynchronous links

A switch comprising front-end and back-end application specific integrated circuits (ASICs) is disclosed. Frame storage and retrieval in the switch is achieved by dividing a frame into equal sized portions that are sequentially stored in switch memory during an assigned time slot. Control logic coupled to the front-end and back-end ASICs assigns the time slot either dynamically or statically.

Time slot memory management in a switch having back end memories stored equal-size frame portions in stripes

A link level flow control technique implements a 'pull frame' transmission model in a Fibre Channel network. In one embodiment, frames remain in a first Fibre Channel device until they are requested by a second Fibre Channel device, wherein the second Fibre Channel device does not issue a request unless conditions are such that it can immediately transmit the frame toward its target destination. In another embodiment, a Fibre Channel device provides hardware messaging capability to support the pull model. In yet another embodiment, multiple Fibre Channel devices in accordance with the invention may be coupled to provide high port-count Fibre Channel switches.

Frame-pull flow control in a fibre channel network

In a data processing system having a main store addressed by system addresses and a buffer addressed by logical addresses, where more than one logical address may map to a single system address, a translation buffer is adapted to provide a means for linking translation buffer locations that may map to a given system address to identify all synonym logical addresses. The implementation includes a list header table that generates a pointer to the translation buffer in response to a system address. A search of the translation buffer beginning at the location identified by the list header table and proceeding through each linked location is carried out to identify all synonym logical addresses. The synonym logical addresses are associated by an exclusive ordered list and a means is provided for updating the exclusive list when new entries are made in the translation buffer or old entries are deleted.

Apparatus for enhancing searches of data tables

Disclosed is an apparatus for storing data wherein there are at least two storage units which are addressed by different addressing schemes. The primary storage unit is addressed with a unique addressing scheme while the other storage units are addressed with a scheme wherein more than one of the other addresses may map to a single unique primary address. The apparatus for storing data includes a mechanism for translating all of the unique primary addresses to all of the other addresses which map to that unique primary address.

Growing community of inventors

Sunnyvale, CA, United States of America

Ronald K Kreuzenstein