Diagnostic memory dump method in a redundant processor

a memory dump and memory technology, applied in the direction of redundant hardware error correction, multi-programming arrangement, instruments, etc., can solve the problems of inability to tolerate financial or human costs, data corruption, outages and data corruption, etc., to achieve the effect of imposing on the performance and availability of the system

Inactive Publication Date: 2005-10-27
HEWLETT PACKARD DEV CO LP
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  • Application Information

AI Technical Summary

Problems solved by technology

Highly reliable systems are often implemented in applications with high financial or human costs, in circumstances of massive scaling, and in conditions that outages and data corruption cannot be tolerated.
Unfortunately, capture, handling, and storage of diagnostic information all can impose on performance and availability of a system.
For a sophisticated, complex, or large system, acquisition and handling of diagnostic information can last for many minutes or possibly hours, thereby compromising system availability.
Unfortunately the kernel-level system dump remains large enough to compromise availability.

Method used

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  • Diagnostic memory dump method in a redundant processor
  • Diagnostic memory dump method in a redundant processor
  • Diagnostic memory dump method in a redundant processor

Examples

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Embodiment Construction

[0018] Various techniques may be used to capture a memory dump of a computing system. In one example, a computing system composed of multiple redundant processors can capture a memory dump by having a central processing unit, for example running an operating system that supports multiple redundant processors such as the NonStop Kernel™ made available by Hewlett Packard Company of Palo Alto, Calif., copy the memory of a non-executing central processing unit. In a particular example, the non-executing or “down” processor can run a Halted State Services (HSS) operating system. The executing processor copies the memory dump data from the non-executing processor back to the executing processor's memory and subsequently writes the data to a storage device, such as a disk file.

[0019] In a specific example, a pre-Fast-Memory-Dump (pre-FMD) technique can be used in which the running processor copies raw data from the down processor memory and compresses the raw data in the running processor...

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Abstract

A plurality of redundant, loosely-coupled processor elements are operational as a logical processor. A logic detects a halt condition of the logical processor and, in response to the halt condition, reintegrates and commences operation in less than all of the processor elements leaving at least one processor element nonoperational. The logic also buffers data from the nonoperational processor element in the reloaded operational processor elements and writes the buffered data to storage for analysis.

Description

BACKGROUND OF THE INVENTION [0001] System availability, scalability, and data integrity are fundamental characteristics of enterprise systems. A nonstop performance capability is imposed in financial, communication, and other fields that use enterprise systems for applications such as stock exchange transaction handling, credit and debit card systems, telephone networks, and the like. Highly reliable systems are often implemented in applications with high financial or human costs, in circumstances of massive scaling, and in conditions that outages and data corruption cannot be tolerated. [0002] In a continuously available system, a user expects and desires end-to-end application availability, a capability to achieve a desired operation within an acceptable response time. A scalable system is expected to achieve near 100% linear scalability, scaling from a few processors to thousands in a manner that the amount of useful work done when the nth processor is added to a cluster is essen...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F9/46G06F11/00G06F11/16G06F11/18G06F12/00
CPCG06F9/52G06F2201/88G06F11/1645G06F11/165G06F11/1658G06F11/1683G06F11/1687G06F11/184G06F11/185G06F11/3476G06F11/3495G06F11/3636G06F11/366G06F11/3404G06F11/1641
Inventor BRUCKERT, WILLIAM F.KLECKA, JAMES S.SMULLEN, JAMES R.
Owner HEWLETT PACKARD DEV CO LP
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