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Introduction

The relationship among I/O and system performance is complex, in order to tackle the challenge of resource monitoring we can use iostat, iotop and ionice.

Objectives

• Use iostat to monitor system I/O device activity
• Use iotop to display a constantly updated table of current I/O usage
• Use ionice to set both the I/O scheduling class and the priority for a given process

iostat

Is the workhorse for I/O device activity monitoring on the system.

Introduction

Keep track of processes is a very important task which can be performed by the ps and top utility