Iometer is an
I/O subsystem
A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed ...
measurement and characterization
tool
A tool is an object that can extend an individual's ability to modify features of the surrounding environment or help them accomplish a particular task. Although many animals use simple tools, only human beings, whose use of stone tools dates ba ...
for single and
clustered systems. It is used as a
benchmark
Benchmark may refer to:
Business and economics
* Benchmarking, evaluating performance within organizations
* Benchmark price
* Benchmark (crude oil), oil-specific practices
Science and technology
* Benchmark (surveying), a point of known elevati ...
and
troubleshooting
Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process ope ...
tool and is easily configured to replicate the behaviour of many popular
applications
Application may refer to:
Mathematics and computing
* Application software, computer software designed to help the user to perform specific tasks
** Application layer, an abstraction layer that specifies protocols and interface methods used in a c ...
. One commonly quoted measurement provided by the tool is
IOPS
Input/output operations per second (IOPS, pronounced ''eye-ops'') is an input/output performance measurement used to characterize computer storage devices like hard disk drives (HDD), solid state drives (SSD), and storage area networks (SAN). Like ...
.
History
Created by
Intel Corporation
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 series ...
How To Test Server Performance Using IOmeter
/ref> (Sean Hefty, David Levine and Fab Tillier are listed by the Iometer About dialog as the developers), the tool was officially announced at the Intel Developer Forum
The Intel Developer Forum (IDF) was a biannual gathering of technologists to discuss Intel products and products based on Intel products. The first IDF was held in 1997.
To emphasize the importance of China, the Spring 2007 IDF was held in Beiji ...
(IDF) on 17 February 1998. In 2001 Intel discontinued development and subsequently handed the sources to the Open Source Development Lab for release under the Intel Open Source License
The Intel Open Source license is identical to the BSD license with the following section added:
The extra section does not add to the terms of the license, rather it reminds users of U.S. export laws. As such the IOSL is functionally identical ...
. On 15 November 2001 the Iometer project was registered at SourceForge.net
SourceForge is a web service that offers software consumers a centralized online location to control and manage open-source software projects and research business software. It provides source code repository hosting, bug tracking, mirroring ...
and an initial version was made available. Experiencing no further development, the project was relaunched by Daniel Scheibli in February 2003. Since then it has been driven by an international group of individuals who have been improving and porting
In software engineering, porting is the process of adapting software for the purpose of achieving some form of execution in a computing environment that is different from the one that a given program (meant for such execution) was originally desi ...
the product to additional platforms.
Functionality
Iometer is based on a client–server model
The client–server model is a distributed application structure that partitions tasks or workloads between the providers of a resource or service, called servers, and service requesters, called clients. Often clients and servers communicate over ...
, where one instance of the Iometer graphical user interface
The GUI ( "UI" by itself is still usually pronounced . or ), graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, inste ...
is managing one or more 'managers' (each one representing a separate Dynamo.exe process
A process is a series or set of activities that interact to produce a result; it may occur once-only or be recurrent or periodic.
Things called a process include:
Business and management
*Business process, activities that produce a specific se ...
) which are doing the I/O with one or more worker threads. Iometer performs Asynchronous I/O
In computer science, asynchronous I/O (also non-sequential I/O) is a form of input/output processing that permits other processing to continue before the transmission has finished. A name used for asynchronous I/O in the Windows API is overlappe ...
- accessing files or block devices
In Unix-like operating systems, a device file or special file is an interface to a device driver that appears in a file system as if it were an ordinary file. There are also special files in DOS, OS/2, and Windows. These special files allow ...
(later one allowing to bypass the file system buffers).
Iometer allows the configuration of disk
Disk or disc may refer to:
* Disk (mathematics), a geometric shape
* Disk storage
Music
* Disc (band), an American experimental music band
* ''Disk'' (album), a 1995 EP by Moby
Other uses
* Disk (functional analysis), a subset of a vector sp ...
parameters such as the 'Maximum Disk Size', 'Starting Disk Sector
In computer disk storage, a sector is a subdivision of a track on a magnetic disk or optical disc. Each sector stores a fixed amount of user-accessible data, traditionally 512 bytes for hard disk drives (HDDs) and 2048 bytes for CD-ROMs and D ...
' and '# of Outstanding I/Os'. This allows a user
Ancient Egyptian roles
* User (ancient Egyptian official), an ancient Egyptian nomarch (governor) of the Eighth Dynasty
* Useramen, an ancient Egyptian vizier also called "User"
Other uses
* User (computing), a person (or software) using an ...
to configure a test file upon which the 'Access Specifications' configure the I/O types to the file.
Configurable items within the Access Specifications are:
* Transfer Request Size
* Percent Random/Sequential distribution.
* Percent Read/Write Distribution
* Aligned I/O's.
* Reply Size
* TCP/IP status
* Burstiness.
In conjunction with the Access Specifications, Iometer allows the specifications to be cycled with incrementing outstanding I/O's, either exponentially
Exponential may refer to any of several mathematical topics related to exponentiation, including:
*Exponential function, also:
**Matrix exponential, the matrix analogue to the above
* Exponential decay, decrease at a rate proportional to value
*Exp ...
or linearly
Linearity is the property of a mathematical relationship (''function'') that can be graphically represented as a straight line. Linearity is closely related to '' proportionality''. Examples in physics include rectilinear motion, the linear r ...
. The tool outputs 50 parameters into a .CSV file, allowing multiple applications to analyse and generate graphs and reports on the measured performance.
See also
* DiskSpd
References
External links
Iometer Project homepage
Iometer Project on SourceForge.net
{{Intel software
Input/output
Benchmarks (computing)