The Extreme Performance Series at VMworld 2016

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Yes! It’s back, and more performant than ever! The “Extreme Performance Series” returns for its 4th year! I’m very excited about this year’s Extreme Performance Series mini-track being hosted at VMworld Las Vegas and Barcelona. These sessions are created and presented by VMware’s best and most distinguished performance engineers, principals, architects and gurus. These are Read more...

New Fling: DRS Doctor

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DRS is a very powerful vSphere feature that has been around for years. It’s constantly monitoring host performance to ensure that VM demand is satisfied. When DRS determines that another host in a cluster could better suit a VM, a migration recommendation is generated, and the VM will vMotion to another host. DRS looks at Read more...

Load Balancing vSphere Clusters with DRS

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Recently, a customer reported that DRS was not working to load balance the cluster. Under normal circumstances, a minor imbalance is nothing to be concerned about. This is because the main objective for DRS is not to balance the load perfectly across every host. Rather, DRS monitors the resource demand and works to ensure that every Read more...

DRS Keeps Admins Happy

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DRS is not just about keeping VMs happy.  DRS has many other operational benefits that keep your admins happy too. Let’s dive into the top ways that DRS makes the day in the life so much better for the vSphere admin. Read more...

SIOC: I/O Distribution with Reservations & Limits – Part 2

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Part 1 of this series explains the new reservation capabilities of the ESXi storage scheduler in vSphere 6.0 called mClock.  That article explains how to calculate the number of entitled IOPS during times of contention.  This article will expand on that topic with a couple new scenarios.  The previous article assumed that all the VMs were evenly consuming the Read more...

SIOC: I/O Distribution with Reservations & Limits – Part 1

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The mClock scheduler was introduced with vSphere 5.5 Storage I/O Control (SIOC) and laid the foundation for new capabilities for scheduling storage resources.  vSphere 6.0 expands upon these capabilities and adds the ability to reserve IOPS, providing even more flexibility and control when delivering storage services to virtual machines.  However, this new capability introduces new Read more...

DRS Keeps VMs Happy

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Since the introduction of Distributed Resource Scheduler (DRS) almost 10 years ago, it has become the most trusted way to ensure virtual machines are running at their peak performance. Over 80% of customers that have introduced DRS use it in fully automated mode, which allows for automatic placement and rebalance operations that simplifies capacity planning Read more...

Confessions of an Energy Consciousness Mind

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I have a confession.  My data center kit has been using too much energy. Having kit available at my disposable is great, but I have been wasting this resource when it’s not required by my workloads. And if there’s one thing I try to be conscious of, it’s energy consumption. Just ask my kids who Read more...

vSphere APIs for IO Filtering

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I’ve been fortunate to have one of our super sharp product line managers, Alex Jauch (twitter @ajauch), spend some time explaining to me one of the new enabling technologies of vSphere 6.0: VAIO.  Let’s take a look at this really powerful capability and see what types of things it can enable and an overview of Read more...