The raw disk i/o performance of compaq storage works RAID arrays under tru64 unix

doi:10.2172/15006441

Abstract

We report on the raw disk i/o performance of a set of Compaq StorageWorks RAID arrays connected to our cluster of Compaq ES40 computers via Fibre Channel. The best cumulative peak sustained data rate is l17MB/s per node for reads and 77MB/s per node for writes. This value occurs for a configuration in which a node has two Fibre Channel interfaces to a switch, which in turn has two connections to each of two Compaq StorageWorks RAID arrays. Each RAID array has two HSG80 RAID controllers controlling (together) two 5+p RAID chains. A 10% more space efficient arrangement using a single 1l+p RAID chain in place of the two 5+P chains is 25% slower for reads and 40% slower for writes.

Building a High Performance Raw Disk Subsystem for Alpha/Linux

Garlick,J July 2001

The Linux kernel version 2.2.19 lacks UNIX-style raw disk support, and its SCSI layer is optimized for small transfer sizes. This report describes kernel patches to add raw disk support and enhance performance in the SCSI layer and QLA2x00 Fibre Channel device driver for large transfer sizes. Benchmarks demonstrate raw disk performance of 191 megabytes/second write, 176 megabytes/second read for one megabyte random I/O on a Compaq ES40 computer system with two QLogic QLA2200F Fibre Channel host bus adapters, each connected to two Ciprico RF7010 arrays on arbitrated loop.
DOI: 10.2172/15006845

Full Text Available
FBSAM data transmission package for IBM 360/370 computers. [For rapid movement of large blocks of data directly between user storage arrays and magnetic disk data sets, in FORTRAN IV and assembly language]

Rhoades, W.A. January 1976

The FBSAM subroutine package provides rapid movement of large blocks of data directly between user storage arrays and magnetic disk data sets. No buffer space is required. Large reductions in data transmission time and number of I/0 requests can be obtained. Moves can be concurrent with each other and with computation. A form of random access is available. A demonstration program provides a thorough test of all features. The package is intended for use by FORTRAN programers with little or no assembler language experience. It should be operable on most IBM 360/370 machines. A sample application to an I/0-bound codemore »« less
DOI: 10.2172/7204197

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Modifications of SUPORT, a linear boundary value problem solver: Part I. Pre-assigning orthonormalization points, auxiliary initial value problem, disk or tape storage

Darlow, B.L. ; Scott, M.R. ; Watts, H.A. August 1977

Some new capabilities of the code SUPORT, which solves linear two-point boundary-value problems are discussed. One modification now allows the user to pre-assign a set of orthonormalization points. In this mode of operation, the code does not check when orthonormalization should take place, so care must be taken in selecting the points to produce a satisfactory solution. Some guidelines are offered in using this option. Another capability allows the user easily to solve a boundary-value problem which depends on the solution of a nonlinear initial-value problem. This solution is achieved by simultaneous integration of all equations. Another capability allows themore »« less
I/O Coordination to Improve HEC System Performance: A Marriage of Analytical Modeling, Control Theory, and Differentiated I/O Performance

Teller, Patricia Jane ; Arunagiri, Sarala March 2014
DOI: 10.2172/1122130

Full Text Available
An advanced joint inversion system for CO ₂ storage modeling with large date sets for characterization and real-time monitoring-enhancing storage performance and reducing failure risks under uncertainties

Kitanidis, Peter April 2016

As large-scale, commercial storage projects become operational, the problem of utilizing information from diverse sources becomes more critically important. In this project, we developed, tested, and applied an advanced joint data inversion system for CO ₂ storage modeling with large data sets for use in site characterization and real-time monitoring. Emphasis was on the development of advanced and efficient computational algorithms for joint inversion of hydro-geophysical data, coupled with state-of-the-art forward process simulations. The developed system consists of (1) inversion tools using characterization data, such as 3D seismic survey (amplitude images), borehole log and core data, as well as hydraulic,more »« less
DOI: 10.2172/1261784

Full Text Available

Title: The raw disk i/o performance of compaq storage works RAID arrays under tru64 unix

Abstract

Citation Formats

Building a High Performance Raw Disk Subsystem for Alpha/Linux

FBSAM data transmission package for IBM 360/370 computers. [For rapid movement of large blocks of data directly between user storage arrays and magnetic disk data sets, in FORTRAN IV and assembly language]

Modifications of SUPORT, a linear boundary value problem solver: Part I. Pre-assigning orthonormalization points, auxiliary initial value problem, disk or tape storage

I/O Coordination to Improve HEC System Performance: A Marriage of Analytical Modeling, Control Theory, and Differentiated I/O Performance

An advanced joint inversion system for CO ₂ storage modeling with large date sets for characterization and real-time monitoring-enhancing storage performance and reducing failure risks under uncertainties

Title: The raw disk i/o performance of compaq storage works RAID arrays under tru64 unix

Abstract

Citation Formats

Building a High Performance Raw Disk Subsystem for Alpha/Linux

FBSAM data transmission package for IBM 360/370 computers. [For rapid movement of large blocks of data directly between user storage arrays and magnetic disk data sets, in FORTRAN IV and assembly language]

Modifications of SUPORT, a linear boundary value problem solver: Part I. Pre-assigning orthonormalization points, auxiliary initial value problem, disk or tape storage

I/O Coordination to Improve HEC System Performance: A Marriage of Analytical Modeling, Control Theory, and Differentiated I/O Performance

An advanced joint inversion system for CO 2 storage modeling with large date sets for characterization and real-time monitoring-enhancing storage performance and reducing failure risks under uncertainties

An advanced joint inversion system for CO ₂ storage modeling with large date sets for characterization and real-time monitoring-enhancing storage performance and reducing failure risks under uncertainties