Sean Crookston

Knowledge

· Identify hot keys and fields used with resxtop/esxtop

· Identify fields used with vscsiStats

Skills and Abilities

· Configure esxtop/resxtop custom profiles

· Determine use cases for and apply esxtop/resxtop Interactive, Batch and Replay modes

· Use vscsiStats to gather storage performance data

· Use esxtop/resxtop to collect performance data

· Given esxtop/resxtop output, identify relative performance data for capacity planning purposes

Tools

· vSphere Resource Management Guide

· vSphere Command-Line Interface Installation and Scripting Guide

· Product Documentation

· vSphere Client

· vSphere CLI

· esxtop/resxtop

· vscsiStats

Notes

Reading through the following three links will give you a great insight into using esxtop and vscsiStats.

· http://communities.vmware.com/docs/DOC-11812.pdf

· http://www.yellow-bricks.com/esxtop/

· http://www.yellow-bricks.com/2009/12/17/vscsistats/

Identify hot keys and fields used with resxtop/esxtop

See appendix section for esxtop

Identify fields used with vscsiStats

See appendix section for vscsiStats.

Configure esxtop/resxtop custom profiles

1. Load esxtop

2. Use hot keys to configure how you would like.

· ‘f’ will add and remove fields

· ‘o’ will change the order

· other hot keys will give you settings specific to that view.

3. ‘W’ will save the settings to a new config file

4. Next time you load esxtop use the ‘-c’ option to specify a configuration file

Determine use cases for and apply esxtop/resxtop Interactive, Batch and Replay modes

Batch

Batch mode allows collection that will be captured to a file.

Esxtop –b > file.csv

Replay

Esxtop will replay resource utilization stats that were collected using the vm-support command

The capture from the vm-support command would have been generated by the following command

Vm-support –s –d duration –I interval

You would then unzip/untar this for esxtop to use it.

Esxtop –R <path to dir>

Use vscsiStats to gather storage performance data

http://communities.vmware.com/docs/DOC-10095

http://www.gabesvirtualworld.com/converting-vscsistats-data-into-excel-charts/

Given esxtop/resxtop output, identify relative performance data for capacity planning purposes

Again check out the links mentioned above in this section. They are a must read and will be a great guide in helping to identify performance related issues.

• vscsiStats
• Another VCAP-DCA Post
• VCAP-DCA Mock Lab Q6
• VCAP-DCA Mock Lab Q4
• VCAP-DCA Mock Lab Q3
• VCAP-DCA Mock Lab Q2
• VCAP-DCA Mock Lab Q1
• Another VCAP-DCA Post
• Objective 9.3 – Configure vCenter Server Linked Mode
• Objective 9.2 – Plan and Execute Scripted Installations