Administering VMFS - VMware's Cluster File System

Learn how to create, monitor, expand capacity and administer VMFS volumes. | taught by Larry Karnis

Course description

VMware File System (or VMFS) is a proprietary, hierarchical, shared storage cluster file system that supports active / active access by up to 64 concurrent ESXi hosts. VMFS was designed by VMware to support the unique needs of Virtual Machines for fast, high capacity, highly available and scalable storage.

In this class you will learn:

  • The unique features and benefits of VMFS
  • How to create a VMFS datastore on shared storage
  • Two capacity management techniques - LUN Spanning and Growing LUNs
  • The pros and cons of ESXi's three multipathing solutions: Round Robin, Fixed Multipathing and Most Recently Used Multipathing
  • How to change the multipathing setting for a VMFS datastore to maximize performance and availability
  • The features and benefits of VMware APIs for Array Integration (VAAI) capable storage
  • How to maximize performance to a SAN that does not support Active / Active multipathing
  • Best Practices when working with shared SAN storage

By the end of this course you will be able to connect your ESXi host to shared SAN storage, configure datastores for optimum performance and reliability, select the best multipathing option for your SAN and build / administer SAN storage according to best practices.

Larry Karnis
Larry Karnis
VMware Certified Professional - Author, Consultant, Lecturer

Get VMware vSphere & View Training... for less!

Q: What do you do if you need to learn VMware but can't afford the $4,000 - $6,000 charged for authorized VMware vSphere training? 

A: Enroll in my equivalent VMware vSphere 6.5 and Horizon View video-on-demand training... for less.

Many name is Larry Karnis - and I create courses that will help you start your career as a VMware vSphere 6.5 administrator, and help you build you knowledge and skill in vSphere 6.5 advanced features and capabilities. 

With Video-On-Demand training, I can provide more insight and detail, without the time constraints that a normal instructor led training class would impose. My goals are to:

  • Give you a better training experience than classroom training
  • Help you learn more than you can learn in a 5 day class
  • Give you the opportunity to learn at your own pace
  • Provide you to supporting books and hands-on lab rentals

At price points that you (or your boss) will appreciate.

Run This Class At Your Office

ESXLab maintains a pool of high-scoring, experienced instructors who would be glad to lead this event at your place of work. If you have 5 or more people and would like to run live instructor led (distance or on-site) training, please contact me for a quote.

About Me

I am an Information Technology consultant / trainer with over 30 years of experience in system administration, networking, security, infrastructure and security.

I worked for 10 years as a UNIX programmer / consultant before moving to Linux in 1995. I started working with VMware products in 2001 and decided to focus exclusively on VMware in 2004. I earned my first VMware Certified Professional (VCP) designation on ESX 2.0 in 2004 (VCP #: 993). I have also earned VCP in ESX 3, and in vSphere 4 and 5.

My VMware Work Experience

  • I have been providing VMware consulting and training for more than 14 years. I have lead literally hundreds of classes and taught thousands of people how to use VMware. I teach both introductory and advanced VMware classes.
  • I worked for VMware as a senior contract VMware Certified Instructor (VCI) and consultant for almost 5 years. One of my regular duties was to help mentor new VCI's - helping them prepare for and successfully deliver vSphere classes.
  • After leaving VMware, I launched my own training business focused on VMware virtualization in 2008. In 2013, VMware called me back to help them ramp up support services for the upcoming vSphere 5.1 product launch.
  • Prior to VMware, I worked as a contract consultant / trainer for RedHat (I hold RHCE, RHCI and RHCX), Global Knowledge, Learning Tree and many other training and consulting companies.

I hold a Bachelor of Science degree (majoring in Computer Science with a minor in Math) from the University of Toronto, Canada. 

I also hold numerous industry certifications including VMware Certified Professional on VMware Infrastructure 2 & 3 and vSphere 4 & 5 (ret.), VMware Certified Instructor (ret.), RedHat Certified Engineer (RHCE), RedHat Certified Instructor (RHCI) and RedHat Certified Examiner (RHCX) as well as certifications from LPI, HP, SCO and others.

I hope to see you in one of my VMware classes very soon... If you have questions, please contact me directly.

And... please link to me on LinkedIn -



Larry Karnis

For more information or for questions about this course, please contact:

Larry Karnis
President, ESXLab

+1 (905) 451-9488 x100
Mobile+1 (416) 890-8191
ESXLab VMware vSphere and View Training

Course Curriculum

Administering VMFS - VMware's Cluster File System
Administering VMFS - VMware's Cluster File System FREE TRIAL
VMware's Cluster File System - Overview FREE TRIAL
VMFS - Project Plan FREE TRIAL
Shared VMFS Storage FREE TRIAL
VMware File System (VMFS) - Explained FREE TRIAL
VMFS Version 5 Features
VMFS Auto Discovery
Building a VMFS
VMFS Name and Storage Device Selection
Storage Device Partition Configuration
Reviewing the New VMFS Datastore
VMFS Datastore Settings
The Consequences of Running out of Space on a VMFS Datastore
VMFS Capacity Management Options
Option 1 - LUN Span - Before
LUN Span - After
Create and Grow a LUN Span
Increase Datastore Capacity - Select Storage Device
Review the Completed LUN Span
Spanned LUNs - Concerns
Option 2 - Grow the VMFS Storage Device, Then Partition and File System
Expanding the VMFS Partition and File System
Growing an Existing VMFS Into Freshly Allocated Space
Review Updated VMFS Capacity
Fibre SAN Path Failure - Explained
iSCSI SAN Multipathing - Explained
Storage Multipathing
VMware Provided Path Selection Policies (PSPs)
Review VMFS Path Selection Policy
Manage VMFS Path Selection Policy
ESXi's Pluggable Storage Architecture
SAN Storage Considerations
SAN Storage - Best Practices
SAN Storage - Best Practices Continued
VMFS Multpathing - Best Practices
Working with VMFS Datastores - Lab FREE TRIAL
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