Solved

Calculating IOPS on physical server as virtualization candidate.

Posted on 2011-03-01
5
1,494 Views
Last Modified: 2012-08-14
I am working a project where I need to virtualize 30 existing physical servers.

I have collected perfmon data over the last week using logman including physical and logical disk counters.

I am currently looking at disk reads/sec and disk writes/sec, but these numbers aren't adding up to IOPS.    For example I have 1 server with a RAID1.  Perfmon says the reads/sec had an average of 6/sec over the last week, but the maximum was 656/second.   But this can't possibily be right if the maximum (without solid state drives) would be about 150-180/IOPS per second.

What microsoft counters can I use to calculate the average IOPS usage per logical or physical disk without having direct access to the physical hardware.
0
Comment
Question by:USWired
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 34

Expert Comment

by:Michael-Best
ID: 35011645
0
 
LVL 5

Assisted Solution

by:chkdsk01
chkdsk01 earned 250 total points
ID: 35011957
If you already have a vCenter server you can install the guided consolidation plugin.  This lets you monitor performance of physical servers and it will give you a confidence rating showing you if the servers are good virtualization candidates.  I wouldn't use this entirely to base my judgement, but it helps.
0
 
LVL 30

Accepted Solution

by:
Duncan Meyers earned 250 total points
ID: 35012410
You're on the right track. The most likely reason that you're seeing a peak of 656 IOPS on a mirrored pair is that RAID controller cache (or on-disk cache for that matter) has handle the peak workload.

You are correct regarding 150 to 180 IOPS But this is a sizing number. That is; your disks will handle 180 IOPS day in, day out without breaking a sweat. They'll handle up to 2 to 2.5 times that workload before response times become unacceptable, so you could see 360 to 450 IOPS per drive for 15k scsi or SAS drives.
0
 

Author Comment

by:USWired
ID: 35013137
Actually I found the numbers I was looking for which was Physical Disk - Disk Reads/sec and Disk Writes/sec as opposed to Logical Disk - Disk Reads/sec and Disk Writes/sec.
0
 
LVL 30

Expert Comment

by:Duncan Meyers
ID: 35013185
Thanks! Glad I could help.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to deploy secondary Domain Controller in Azure AD as DR environment ? 4 95
google retention policy 4 120
Esxi host patches. 5 117
HP Storage and Cisco Nexus 4 64
In this article, I will show you HOW TO: Suppress Configuration Issues and Warnings Alert displayed in Summary status for ESXi 6.5 after enabling SSH or ESXi Shell.
Is your phone running out of space to hold pictures?  This article will show you quick tips on how to solve this problem.
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question