David Ziembicki on Infrastructure Architecture : Virtualization

Private Clouds: Believe it or not?

davidzi — Sun, 23 Aug 2009 23:01:01 GMT

Recently there has been some healthy debate around the validity of “private clouds” and whether such a construct is new or just a different name for virtualization and automated provisioning, i.e. a marketecture. In this corner for the anti-Private Cloud sentiment, we have the 2009 Prediction – Rise and Fall of the Private Cloud which argues there is really no such thing as a private cloud and the concept will die quickly as everyone moves to the public cloud. There are some excellent points in this article, I’ll address several below. Take a quick read and come back, I’ll wait… In the other corner, we have Christofer Hoff from Cisco and his response. Finally, Reuven Cohen hits the nail on the head with his post A Public Cloud by Any Other Name is Private which basically states that this is all basically definitional dancing where people argue about concepts without defining any of the underpinning terms.

People’s opinions on this topic seem to correlate most with whether they believe the defining attributes of cloud computing are financial (only paying for capacity utilized, no capex, etc) or whether they believe the defining attributes are technical (shared infrastructure, scale-out architectures, dynamic provisioning). The folks who focus on the financial side tend to believe either there cannot be private clouds because all costs are still incurred by the organization or that there is no way a single organization will be able to drive costs as low as the large cloud providers can with economies of scale.

The folks who see cloud computing as more of an architecture pattern for applications and an infrastructure/operational model tend to believe that the approach is just as relevant for a public cloud provider as it is for a large internal IT organization.

I am firmly in the camp of those who believe private clouds are going to be an important part of IT for at least the next decade. I come to this view using my definition of a cloud which is: an infrastructure architecture, application development model, and operations management discipline that dynamically provide necessary services whenever and wherever they are needed while sharing costs between all users.

Using that definition, all manner of clouds including public, private, hybrid, etc. will exist. Will there be certain economies of scale that a Microsoft or Amazon with hundreds of thousands of servers will be able to achieve that a single business won’t? Of course. But there will also be a degree of customization and agility that private clouds will be able to achieve that large providers won’t.

The reason I believe that private clouds as a concept are something new is that this is the first time that all of IT (infrastructure, development, and operations) are being looked at holistically. This is much more than just being able to sling VMs about the datacenter. This about providing a cost effective infrastructure where code that addresses user needs, be it an app, a VM, or a service can be developed rapidly by using foundational services, deployed near real-time, scale as needed, and then be retired at the end of its useful life.

I’m excited by Microsoft’s opportunities along the full spectrum of the cloud. Azure is a very forward looking vision of the public cloud that I still don’t think most people are grasping yet. Likewise, Microsoft’s traditional on premise solutions are evolving very quickly toward both private cloud and public cloud implementations. To me the most important question that will determine our long term success is how well we are able to provide a seamless continuum between the Azure platform and our Server and Tools solutions as they evolve toward cloud services. I think we are targeting an end game that no one else is really going after from on-premise, through private cloud, to public cloud.

Everything you ever wanted to know about VHDs

davidzi — Sun, 16 Aug 2009 18:33:49 GMT

The Virtual Hard Disk Getting Started Guide is 61 pages of great info outlining all the relevant scenarios, configurations, and options for using VHD files. This was release about 3 weeks ago but I missed it at the time due to training and TechReady9. The guide outlines basic scenarios like booting Windows 7 or Server 2008 R2 from VHD as well as more advanced scenarios like migrating at VHD between physical and virtual environments, etc. If nothing else this is worth a quick read of the table of contents because you will likely see things in there that you didn’t realize you could do with VHDs.

Here is the official description of the doc:

“Windows Server® 2008 R2 and Windows® 7 is the first version of Windows to provide native support for virtual hard disks (VHDs). This guide describes the scenarios that guided the development of this feature, detailed steps about how to employ the functionality (including image creation, deployment, and maintenance), and the associated tools, scripts, and APIs.”

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=d2afacbb-5af6-45c2-b275-932116e27b0b

Cloud Computing: Taxes Analogous to Atmospheric Pressure

davidzi — Thu, 06 Aug 2009 16:11:23 GMT

In a blog posting earlier this week, the Azure team announced that they would be moving all Azure applications out of our “USA – Northwest” datacenter. I was fascinated by this given that the stated reason for this move is a change in local tax law which presumably make it less financially attractive to offer the services from that area. Mike Manos published a great blog post on the topic this morning called “The Cloud Politic – How Regulation, Taxes, and National Borders are shaping the infrastructure of the cloud”. Definitely worth reading and considering the implications.

So where will cloud infrastructure form? Consider the real thing in nature and substitute taxes for atmospheric pressure. Below is a paraphrased description from NOAA:

Wind is simply the air in motion … Pressure gradient is the difference in pressure between high and low pressure areas … What happens to the converging winds near a low? … It has to go somewhere so it is forced to rise. As it rises it cools. When air cools it can hold less water vapor so some of the invisible vapor condenses, forming clouds and precipitation … What about the diverging air near a high? … As air warms it can hold more water vapor, which means that clouds will tend to evaporate.

Bottom line, cloud infrastructure will tend to emerge in low tax, low energy cost, high connectivity areas. This much is obvious and has been a key part of data center site selection methodologies as Manos alluded to. To date these have mostly dealt with “where do we plant these multi-hundred million dollar facilities to exist for at least 10 years”. As the move by the Azure team demonstrates however, what runs in these datacenters can be moved around at will. Is it running internal applications and thus maybe not taxable activity? Or is it running a revenue generating activity that may be taxed? If so, does the datacenter in the next state provide a lower tax environment? If yes, move the workload there, and so on.

With an ever growing percentage of computing likely to migrate toward the large cloud providers, small percent differences in the tax rate, cost of power, etc. can have a large impact on the profitability of providing cloud services. You see this today with certain localities actively shaping public policy around attracting datacenter construction.

Over time I think this will lead to several architectural trends. The first is that an ever increasing number of input parameters (tax rate, power cost, bandwidth, etc) will be utilized by cloud infrastructure software to determine where best to run customer workloads. Where today this occurs mostly during site selection, this will rapidly evolve to the point where it is near real-time and workloads will transparently migrate to follow low cost off-peak power, regions with lower taxes, etc. While workloads are easier to move than entire datacenters, even that is very likely to change given the numbers at stake. Most people have heard of Microsoft’s Chicago datacenter where the first floor is comprised of shipping containers and totals hundreds of thousands of servers. This capacity is obviously mobile but requires supporting facility infrastructure which to date is in fixed locations only. If you look at Microsoft’s Gen4 datacenter vision, you’ll see that eventually even most of the supporting infrastructure will be modular and mobile as well.

These trends will make for some very interesting infrastructure architecture challenges. The clouds will form near low pressure areas…

TechReady9 Day 4 and 5 Wrap-up

davidzi — Sat, 01 Aug 2009 01:46:22 GMT

Day 4 and 5 of TechReady were action packed, I didn’t even have time to post yesterday. I skipped the first session timeslot on Thurs to prepare for the double session I was presenting with Citrix. The double session format basically allocates two sessions (3 hours) to one topic letting you get into a lot more detail. The session went very well and the feedback surveys so far have been very positive. We spent the first half of the session describing the Microsoft+Citrix VDI solution and its components. The second half was filled with demos of the solution with different types of clients accessing VDI sessions and walkthroughs of the administrator consoles.

After my session and some internal meetings, I attended a session on Microsoft’s Dynamic Datacenter Toolkit. I haven’t had much time to explore this yet but will be focusing on that a lot in the next couple months. For an example of a hosting partner using this solution, check out MaximumASP.com and their MaxV solution.

Finally on Day 4 I attended a session on the Remote Desktop Services (RDS) improvements in Windows Server 2008 R2, particularly the built-in VDI solution. I’ve been so focused on the Microsoft+Citrix solution that I haven’t had time to dig into the Microsoft in-box solution. This is being positioned toward branch and or lower complexity environments while the Microsoft+Citrix solution is targeted toward large or higher complexity implementations. The improvements to RDP and Hyper-V are the real enablers for the VDI scenarios in R2.

Day 5 opened with multiple demos of Office 2010 and Office Web Applications which are really going to open up completely new scenarios for rich collaboration. Next was a keynote from my favorite Microsoft executive, Bob Muglia, head of the Server and Tools Business. Bob covered improvements in Windows, Hyper-V, SharePoint, SQL. The thing TechReady is best for is stepping back and seeing the scope of this release of software we are going to have this year and the solid advancement in capability and features on almost all fronts simultaneously.

After taking care of some logistical items, I attended a session on Hyper-V security. Not much new info in that one, basically there is good security guidance for Hyper-V in the Windows Server 2008 Security Guide as well as the Hyper-V Resource kit. Finally, I attended a session on Windows 7 and Windows Server 2008 R2 branch office infrastructure. This covered the new Branch Cache feature which can substantially reduce bandwidth utilization in branches by caching content as well as other new features and improvements to SMB, DFS, etc.

All in all, TechReady9 was a great time. I’ve still got a list of sessions that I want to see that is longer than the list of sessions that I actually saw! I’m glad they were all recorded…

Tomorrow and Sunday I’ll be teaching a 2-day VDI class along with some MCS and Citrix colleagues. Should be a good class, the students will learn about and set up the entire Microsoft+Citrix VDI solution over the course of the two days. Then finally on Monday I will head home after almost two and half weeks on the mothership!

TechReady9 Day 3 Wrap-up

davidzi — Thu, 30 Jul 2009 18:22:11 GMT

Day 3 kicked off with a keynote by Ray Ozzie and several very cool demos on UI futures, what’s coming across some of the Bing features, and some stuff MSR is working on. There was also a good discussion of how concepts move from MSR, to Labs, then into the product groups.

Next up was a very entertaining session with Jeff Woolsey, the Hyper-V program manager and president of the “virtualization nation”. This session dealt point by point with the FUD put out there by the competition. Aside from the entertainment, it was actually quite valuable because we get hit with some of these outlandish claims by customers all the time who’ve drank the cool-aid of the other guys.

Next up was a session on Terminal Services, which is being re-branded as Remote Desktop Services (RDS). Most of the new features in R2 were discussed (RDP 7, multi-monitor support, VDI) with some cool demos. One showed a six monitor setup over RDP with full multi-monitor support (I use three at home…)

After lunch was a session on the next version of OCS. Voice and PBX replacement are the key themes of this release, beyond that I can’t say much about the content.

In the afternoon I attended a session on VDI using the Microsoft and Citrix solution. This was an intro session to the deep dive that I’m doing today with the RDS PM and some Citrix colleagues. Good session, some good demos of the combined functionality that the two companies provide and how the solution is more fully featured and less expensive than the competition.

The day wrapped up in the evening with “Ask the Experts” which is an event where all the presenters and product group folks are stationed at tables in main dining area and the Techready attendees can come in and ask questions, network, etc. It’s a great opportunity to meet folks from the product groups as well as others you may not have seen in a while. Every year I bump into people I haven’t seen in years or who have recently joined Microsoft that I worked with before. This year was no different.

Day 4 should be action packed, I present during the 10:15 timeslot on VDI.

Virtualization and Cloud Computing Real-time Feeds!

davidzi — Wed, 08 Jul 2009 00:26:33 GMT

As mentioned here and in a few other posts, I’ve been using Friendfeed and Twitter quite a bit over the last couple months. I’ve been extremely impressed with Friendfeed in particular. I’ve created two Friendfeed groups that I’ve been posting content to in addition to my main feed. The groups are:

Microsoft Virtualization

Cloud Infrastructure

Their focus is self explanatory but consist of posts, comments, etc. from a variety of sources that I find relevant to each of those topics. The feeds also include posts from the relevant categories from this blog. Please join these groups if you have interest in these areas.

While these feeds are available over on the Friendfeed website, I’m also leveraging a feature they just rolled out around real-time search. If you scroll down the sidebar in my blog, you will see links to two new pages I’ve added:

Virtualization

http://blogs.technet.com/davidzi/pages/virtualization.aspx

Cloud Infrastructure

http://blogs.technet.com/davidzi/pages/cloud-infrastructure.aspx

These pages embed Friendfeed real-time searches scoped to the groups I created and will therefore update in real-time whenever I post or share new content to the group. If you want a wider scope in your results, take out the group: tag and put in any keyword you want such as “virtualization” and you will get updating results each time someone posts something to Friendfeed with that term.

For folks with similar interests, I think these feeds will be valuable as my goal is to highlight the top couple of articles, posts, etc that I come across each day out of the 50 – 100 that I read. Enjoy!

New Microsoft Security Site for Governments

davidzi — Tue, 07 Jul 2009 00:44:41 GMT

A new Security section has been added to the government site on Microsoft.com. The site consolidates a number of relevant tools, solutions, case studies, and links relevant to Public Sector organizations. Several of the solutions call for specific mentions here:

Federal Desktop Core Configuration (FDCC)

Federal Server Core Configuration (FSCC)

Infrastructure Optimization (IO)

Server Virtualization

The site also includes a brief interview with a colleague of mine in the Federal practice, Bill Billings, the Chief Security Officer of Microsoft Federal. In the video Bill discusses some of the cyber security priorities of the Obama administration and the areas Microsoft is working with the administration.

Dynamically Provisioning Customized Virtual Machines with VMM

davidzi — Wed, 01 Jul 2009 02:46:07 GMT

There’s a good technical post over on Chris Adam’s blog about how to dynamically provision customized virtual machines by using System Center Virtual Machine Manager and unattend.xml. The unattend.xml file is used in combination with a sysprep’d image and applies customization (things like computer name, installed roles, etc) that are specified in the XML file. Chris’s post explains how this can be done very easily in VMM.

This post was timely as I have been working on some unattended installations and other automation for a customer I am working with. With all the focus on the back and forth with competitors at the virtualization layer, it almost seems like the workload and configuration inside the VM is “getting no respect”.

In any event, the unattended installation realm can be intimidating at first. There are multiple ways of accomplishing most tasks, there is an enormous amount of things in Windows that can be customized, etc. Microsoft makes a large number of resources available such as the Windows Automated Installation Kit, Microsoft Deployment Toolkit, etc. There are beta updates to these for Win7, R2, etc. that can be found on Bing.com.

For a very detailed treatment on all of these topics, check out the Deploying Vista series over on WindowsNetworking.com Most of the content is the same for Windows 2008 servers as well. This article on Technet is quick and direct step-by-step guide for a basic automated installation. Between the info Chris provided and some of these resources, you’ll be well on your way to dynamic VM provisioning.

Head-to-Head: Workflow Studio vs PowerShell for Automation

davidzi — Sun, 28 Jun 2009 21:07:11 GMT

Here’s an interesting and slightly amusing mock debate between Brandon Shell and Jason Conger on Citrix’s Workflow Studio vs PowerShell for automation. If you aren’t familiar with it, here is the description of what Workflow Studio is:

“Citrix Workflow Studio™ is an infrastructure process automation platform that enables you to transform your datacenter into a dynamic delivery center.”

“Built on top of Windows PowerShell™ and Windows Workflow Foundation, Workflow Studio provides an easy-to-use, graphical interface for workflow composition that virtually eliminates scripting. Workflow Studio acts as the glue across the IT infrastructure allowing administrators to easily tie technology components together via workflows.”

The debate is amusing because in reality both guys understand that each has its place, one is a foundational component of the other, and the combination of the two can be extremely powerful. The core of the “debate” is one’s definition of automation: execution of atomic tasks with as little effort/code as possible (basic PowerShell) or event/workflow driven execution of multiple tasks with associated logic (advanced PowerShell and/or Workflow Studio). The first is an enabler for the latter.

It’s been my opinion since Exchange 2007 and Virtual Machine Manager 2007 committed entirely to PowerShell and with the PowerShell team’s continued focus on simplicity and consistency, that this was the tipping point that was going to enable real automation and orchestration of IT infrastructures. Now with partners (Citrix) and competitors (VMware) alike building on and/or leveraging PowerShell, we’re going to see significant advancements in the state of the art this year.

Download the Hypervisor Functional Specification v2.0

davidzi — Mon, 22 Jun 2009 15:46:01 GMT

The Hypervisor Functional Specification v2.0 for Windows Server 2008 R2 has been posted to the web and can be found here. The original v1.0 version for Windows Server 2008 RTM was described in this post.

Here is the overview of the v2.0 version:

This document is the top-level functional specification (TLFS) of the second-generation Microsoft hypervisor. It specifies the externally visible behavior of the Microsoft hypervisor, a component of Microsoft Windows Server 2008 R2 Windows Server virtualization. The document assumes familiarity with the goals of the project and the high-level hypervisor architecture. This specification is provided under the Microsoft Open Specification Promise. For further details on the Microsoft Open Specification Promise, please refer to: http://www.microsoft.com/interop/osp/default.mspx. The Hypervisor Functional Specifications document specifies the externally visible behavior of the Microsoft hypervisor, a component of Microsoft Windows Server 2008 R2 Windows Server virtualization. The specifications can be used to understand the functions of the hypervisor and implement a compatible solution.

Published in the Microsoft Architecture Journal

davidzi — Fri, 19 Jun 2009 03:28:40 GMT

I was able to get a small commentary on desktop virtualization and VDI published in the Microsoft Architecture Journal. It’s based on the work I’ve been doing around creating a VDI offering to augment Microsoft’s server virtualization offerings. For a slightly expanded version of my thoughts on this topic, see this post. As with server virtualization, desktop virtualization makes sense in a lot of cases but not all. I outline a simple framework for for choosing the optimum mix of solutions for your user base.

Networking and Remote Desktop Technical Resources

davidzi — Fri, 12 Jun 2009 20:15:15 GMT

The links below lead to a series of technical whitepapers on DirectAccess, BranchCache, and Remote Desktop Services in Windows Server 2008 R2.

Networking Resources: DirectAccess and BranchCache

Remote Desktop Resources: Kerberos, User Profiles, RemoteApp

White Paper: Comparing the Power Utilization of Native and Virtual Exchange Environments

davidzi — Wed, 10 Jun 2009 15:07:12 GMT

The Exchange team has published a whitepaper on TechNet comparing the power utilization of a typical 8 server physical Exchange environment compared to a a virtualized environment using the same number of logical processors but on only two Hyper-V host servers. The result: a 50% reduction in power usage (excluding storage). If storage is included it was a 37% reduction.

The purpose of the test was to isolate on power consumption scenarios so other things like cooling and space savings weren’t considered but would also be measurable benefits. There is also a link to general guidance on virtualizing Exchange as it makes sense in a lot of scenarios but not all.

Windows Server 2008 R2 to RTM in July!

davidzi — Wed, 03 Jun 2009 02:09:14 GMT

The Windows Server Division blog announced that Windows Server 2008 R2 is tracking with Windows 7 and both are planned to RTM in the second half of July with General Availability on Oct 22! That RTM date is earlier than I thought it would be, I was thinking late August. The more I dig into R2 the more impressed I am with how many new features (Hyper-V R2, lots of RDS improvements, DirectAccess, etc, etc) were added in what the product group calls a minor release!

New Remote Desktop Services VDI Step-by-Step Guides Released

davidzi — Tue, 26 May 2009 19:05:55 GMT

New step-by-step guides have been posted for the new Remote Desktop Services (RDS) found in Windows Server 2008 R2 including the new VDI scenarios. These replace the original step-by-step guide from a couple months ago that was basically too big since it included all these scenarios in one and was a bit difficult to follow. I’ve been so focused on the combined Microsoft+Citrix solution lately that I haven’t had time to dig into the RDS-only solution yet. That will change this weekend!

Installing Remote Desktop Session Host Step-by-Step Guide

This step-by-step guide walks you through the process of setting up a working Remote Desktop Services infrastructure in a test environment. During this process, you create an Active Directory® domain, install the Remote Desktop Session Host (RD Session Host) role service, and configure the Remote Desktop Connection client computer.

Deploying Remote Desktop Web Access with Remote Desktop Connection Broker Step-by-Step Guide

This step-by-step guide walks you through the process of setting up a working RemoteApp source accessible by using Remote Desktop Web Access (RD Web Access) in a test environment.

Deploying Personal Virtual Desktops by Using Remote Desktop Web Access Step-by-Step Guide

This step-by-step guide walks you through the process of setting up a working personal virtual desktop accessible by using Remote Desktop Web Access (RD Web Access) in a test environment.

Deploying Virtual Desktop Pools by Using Remote Desktop Web Access Step-by-Step Guide

This step-by-step guide walks you through the process of setting up a working virtual desktop pool accessible by using Remote Desktop Web Access (RD Web Access) in a test environment.