Iostat

Overview

Iostat에 대한 기술 문서입니다.

Summary

• 무엇인가? - Iostat
• 왜 필요한가? - HPC 및 서버 환경에서 필수 개념
• 언제 사용하는가? - 서버 구성, 성능 튜닝, 문제 해결 시

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Purpose

이 문서가 존재하는 이유

• Goal: Iostat에 대한 기술 정보 제공
• Scope: Iostat의 개념, 사용법, 설정
• Non-goals: 다른 주제로의 확장

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Key Concepts

Concept	Description	Related
Iostat	HPC/서버 환경에서 중요한 기술 개념	Linux, Server

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Detailed Explanation

iostat is a command-line utility that reports CPU statistics and input/output statistics for devices and partitions.

#The basic syntax of the iostat command
$iostat [options] [interval [count]]
#options: options can be used to specify the type of statistics to be displayed, such as disk statistics, CPU utilization statistics, etc.
#interval: The interval parameter specifies the amount of time in seconds between each report
#count:The count parameter can be specified in conjunction with the interval parameter. If the count parameter is specified, the value of count determines the number of reports generated at interval seconds apart. If the interval parameter is specified without the count parameter, the iostat command generates reports continuously.

#iostat output example
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
device 0.00 0.00 100 50 50 100 10 3.00 0.00 0.00 5.00
# IOPS from the output
The IOPS for this device is r/s + w/s = 100 + 50 =150

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Best Practices

• 최신 버전 사용 권장
• 공식 문서 참고
• 테스트 환경에서 먼저 검증

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References

• Iostat

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Related Pages

• Linux
• Server
• Hardware
• Network

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Knowledge Graph

Related

→ Linux → Server → Hardware → Network

iostat output label and meaning

column	Description