Archive
Organizational Challenges with #VDI – #Citrix
And yet another good blog post by Citrix and Wayne Baker. This is an interesting topic and I must say that the blog posts still goes into a lot of the technical aspects, but there are more “soft” organisational aspects to look into as well like service delivery/governance model and process changes that often are missed. And as Wayne also highlights below and that’s worth mentioning again is the impact on the network that also was covered well in this previous post: #Citrix blog post – Get Up To Speed On #XenDesktop Bandwidth Requirements
Back to the post itself:
One of the biggest challenges I repeatedly come across when working with large customers attempting desktop transformation projects, is the internal structure of the organisation. I don’t mean that the organisation itself is a problem, rather that the project they are attempting spans so many areas of responsibility it can cause significant friction. Many of these customers undertake the projects as a purely technical exercise, but I’m here to tell you it’s also an exercise in organisational change!
One of the things I see most often is a “Desktop” team consisting of all the people who traditionally manage all the end-points, and a totally disparate “Server” team who handle all the server virtualization and back-end work. There’s also the “Networks” team to worry about and often the “Storage” team are in the mix too! Bridging those gaps can be one of the areas where friction begins to show. In my role I tend to be involved across all the teams, and having discussion with all of those people alerts me to where weaknesses may lie in the project. For example the requirements for server virtualization tend to be significantly different to the requirements for desktop virtualization, but when discussing these changes with the server virtualization team, one of the most often asked questions is, “Why would you want to do THAT?!” when pointing out the differing resource allocations for both XenApp and XenDesktop deployments.
Now that’s not to say that all teams are like this and – sweeping generalizations aside – I have worked with some incredibly good ones, but increasingly there are examples where the integration of teams causes massive tension. The only way to overcome this situation is to address the root cause – organizational change. Managing desktops was (and in many places still is) a bit of a black art, combining vast organically grown scripts and software distribution mechanisms into an intricately woven (and difficult to unpick!) tapestry. Managing the server estate has become an exercise in managing workloads and minimising/maximising the hardware allocations to provide the required level of service and reducing the footprint in the datacentre. Two very distinct skill-sets!
The other two teams which tend to get a hard time during these types of projects are the networks and storage teams – this usually manifests itself when discussing streaming technologies and their relative impacts on the network and storage layers. What is often overlooked however is that any of the teams can have a significant impact on the end-user experience – when the helpdesk takes the call from an irate user it’s going to require a good look at all of the areas to decipher where the issue lies. The helpdesk typically handle the call as a regular desktop call and don’t document the call in a way which would help the disparate teams discover the root cause, which only adds to the problem! A poorly performing desktop/application delivery infrastructure can be caused by any one of the interwoven areas, and this towering of teams makes troubleshooting very difficult, as there is always a risk that each team doesn’t have enough visibility of the other areas to provide insight into the problem.
Organizations that do not take a wholesale look at how they are planning to migrate that desktop tapestry into the darkened world of the datacentre are the ones who, as the project trundles on, come to realise that the project will never truly be the amazing place that the sales guy told them it would be. Given the amount of time, money and political will invested in these projects, it is a fundamental issue that organizations need to address.
So what are the next steps? Hopefully everyone will have a comprehensive set of requirements defined which can drive forward a design, something along the lines of:
1) Understand the current desktop estate:
#Citrix #PVS vs. #MCS Revisited – #Nutanix, #Sanbolic
Another good blog post from Citrix and Nick Rintalan around the famous topic whether to go for PVS or MCS! If your thinking about this topic then don’t miss this article. Also ensure that you talk to someone who have implemented an image mgmt/provisioning service like this to get some details on lessons learnt etc., also with the change in the hypervisor layer and the cache features this is getting really interesting…
AND don’t forget the really nice storage solutions that exists out there like Nutanix and Melio that really solves some challenges out there!!
http://go.nutanix.com/rs/nutanix/images/TG_XenDesktop_vSphere_on_Nutanix_RA.pdf
Melio Solutions – Virtual Desktop Infrastructure
Back to the Citrix blog post:
It’s been a few months since my last article, but rest assured, I’ve been keeping busy and I have a ton of stuff in my head that I’m committed to getting down on paper in the near future. Why so busy? Well, our Mobility products are keeping me busy for sure. But I also spent the last month or so preparing for 2 different sessions at BriForum Chicago. My colleague, Dan Allen, and I co-presented on the topics of IOPS and Folder Redirection. Once Brian makes the videos and decks available online, I’ll be sure to point people to them.
So what stuff do I want to get down on paper and turn into a future article? To name a few…MCS vs. PVS (revisited), NUMA and XA VM Sizing, XenMobile Lessons Learned “2.0″, and Virtualizing PVS Part 3. But let’s talk about that first topic of PVS vs MCS now.
Although BriForum (and Synergy) are always busy times, I always try to catch a few sessions by some of my favorite presenters. One of them is Jim Moyle and he actually inspired this article. If you don’t know Jim, he is one of our CTPs and works for Atlantis Computing – he also wrote one of the most informative papers on IOPS I’ve ever read. I swear there is not a month that goes by that I don’t get asked about PVS vs. MCS (pros and cons, what should I use, etc.). I’m not going to get into the pros and cons or tell you what to use since many folks like Dan Feller have done a good job of that already, even with beautiful decision trees. I might note that Barry Schiffer has an updated decision tree you might want to check out, too. But I do want to talk about one of the main reasons people often cite for not using MCS – it generates about “1.6x or 60% more IOPS compared to PVS“. And ever since Ken Bell sort of “documented” this in passing about 2-3 years ago, that’s sort of been Gospel and no one had challenged it. But our CCS team was seeing slightly different results in the field and Jim Moyle also decided to challenge that statement. And Jim shared the results of his MCS vs. PVS testing at BriForum this year – I think many folks were shocked by the results.
What were those results? Here is a summary of the things I thought were most interesting:
- MCS generates 21.5% more average IOPS compared to PVS in the steady-state (not anywhere near 60%)
- This breaks down to about 8% more write IO and 13% more read IO
- MCS generates 45.2% more peak IOPS compared to PVS (this is closer to the 50-60% range that we originally documented)
- The read-to-write (R/W) IO ratio for PVS was 90%+ writes in both the steady-state and peak(nothing new here)
- The R/W ratio for MCS at peak was 47/53 (we’ve long said it’s about 50/50 for MCS, so nothing new here)
- The R/W ratio for MCS in the steady-state was 17/83 (this was a bit of a surprise, much like the first bullet)
So how can this be?!?
I think it’s critical to understand where our initial “1.5-1.6x” or “50-60%” statement comes from – that takes into account not just the steady-state, but also the boot and logon phases, which are mostly read IOPS and absolutely drive up the numbers for MCS. If you’re unfamiliar with the typical R/W ratios for a Windows VM during the various stages of its “life” (boot, logon, steady-state, idle, logoff, etc.), then this picture, courtesy of Project VRC, always does a good job explaining it succinctly:
We were also looking at peak IOPS and average IOPS in a single number – we didn’t provide two different numbers or break it down like Jim and I did above in the results, and a single IOPS number can be very misleading in itself. You don’t believe me? Just check out my BriForum presentation on IOPS and I’ll show you several examples of how…
Continue reading here!
//Richard
#Citrix blog post – Get Up To Speed On #XenDesktop Bandwidth Requirements
Welcome to the HDX bandwidth testing blog series! In the following posts I’ll be sharing key findings and results from an extensive round of XenDesktop 5.6 / XenApp 6.5 bandwidth testing. Already using XenDesktop 7? Well then stay tuned for the last post in the series where I will be discussing that as well. Before I begin, I want to take this opportunity to thank Andy Baker and Thomas Berger for their tremendous help and guidance in managing this effort.
Part 1: The Prologue
It is not uncommon these days to have great LAN networks with what seems like unlimited bandwidth. I find myself at the office running multiple virtual desktops, uploading my files to ShareFile, all while streaming Spotify to my machine at the same time without even noticing. Even at home you have a nice fast connection just for yourself. Unfortunately many users do not have this luxury due to expensive business grade connections which are often over utilized. Overlooking this fact during a deployment can result in frozen and disconnected sessions and an overall poor user experience. This leaves IT departments frequently asking “how much bandwidth do I need for XenDesktop?”
Of course the answer to this question – in my opinion more so than most questions – is it depends. Why is that? Because it depends on what is on the screen at any given time. The amount of bandwidth consumed will be close to none when the session is idle, but can vary greatly depending on whether a user is typing, browsing a document, running a slideshow, or watching a video. Of course there is always the magic number of 20-30kbps that has been around forever, but that was before the explosion in multimedia content both on the web and now seen more frequently in applications as well . (Although I would note that we did reach and beat that 20-30kbps zone with some of our less multimedia intensive tests).
To help better answer this question our team decided to start running some tests…..a lot of tests. We measured general daily usage, took a deep dive into single application tests, and put some optimizations and best practices to the test. In part one of this blog I will be discussing the infrastructure and methodology for our first round of testing.
Infrastructure
The tests that I will be discussing were run in the environment shown below. A laptop was connected to anApposite WAN Emulator and used as the endpoint for both the manual and Login VSI tests. The emulator was used to control the bandwidth limits for each scenario that I describe later on in this blog post. The other end of the emulator was connected to a switch that was configured to send all packets in and out of the emulator to a mirrored port monitored by a server running Wireshark. This ensured all communication between the client and virtual desktop were captured without interfering with the VSI scripts. The environment infrastructure and desktop pool were also connected to the switch and communicated transparently to the laptop.
The environment was built using the product versions shown below. This is important to note as future tests are planned with XenDesktop 7 which benefits from newer codecs and algorithms for rendering. These tests were also run with the latest version of Login VSI which features more intense workloads than previous versions and a large randomized content library.
- XenServer 6.1
- Microsoft Server 2008 R2
- Windows 7 x86
- XenDesktop 5.6
- VDA 5.6.2
- Receiver 3.4 Enterprise
- Login VSI 4.0
Disclaimers
Before I begin to explain the tests that we ran I need to make a few disclaimers. The first being that quality of service (QoS) was not…
Continue reading here!
//Richard
#Citrix #XenDesktop 7 on #vSphere Validated Design Guide is available now!
Really good design guide by Citrix and blog post by Carisa Powell:
We are pleased to announce the availability of the Citrix Solutions Lab 5000-user XenDesktop 7 on vSphere Validated Design Guide.
Yes, you read that right, XenDesktop on vSphere. XenDesktop is also known to many vSphere customers as the best VDI solution for vSphere, and this design guide showcases the latest release of XenDesktop features and functionality all being hosted on a vSphere hypervisor. XenDesktop is the best of both virtual apps and desktops from a single platform, so XenDesktop is VDI, XenDesktop is app virtualization, XenDesktop is server-hosted apps and desktops, XenDesktop is secure remote access, XenDesktop is mobility…and with XenDesktop 7 you get all of this functionality from a single platform.
This design guide combines everything that is XenDesktop 7 and delivers it from vSphere to showcase how you can provide an app, desktop, remote access, and more solution for any type of user:
- VDI – XenDesktop offers a variety of VDI use cases, whether the user needs a standardized, corporate desktop that remains consistent and routine, or the user needs a personalized virtual desktop that he or she can customize to meet their business needs. This design guide validates XenDesktop Provisioning Services central image management technology for Pooled VDI on vSphere and XenDesktop Personal vDisk technology for delivering Personal VDI on vSphere.
- Server-hosted Apps and Desktops – XenDesktop also offers server-hosted apps and desktops by leveraging Microsoft Remote Desktop Shared Hosted (RDSH) technology to enable multiple users to connect and share resources from a single server. This design guide showcases XenDesktop server-hosted resources from Windows Servers on vSphere.
- Remote Access – XenDesktop leverages Citrix NetScaler appliances to provide secure, remote access from any location. NetScaler can be a virtual or physical appliance, and this design guide highlights the implementation and configurations of NetScaler Gateway virtual appliances on vSphere.
So why showcase all the features and functionality of XenDesktop 7 on vSphere? Staying true to the Citrix vision, XenDesktop continues to remain the only hypervisor agnostic app and desktop virtualization solution – including VDI, virtual apps and more. This means XenDesktop 7 seamlessly integrates with any hypervisor including Microsoft Hyper-V, Citrix…
Continue reading here!
//Richard
#Microsoft – On the right track! – #Windows, #BYOD, #Citrix
I don’t know if you all agree but I find that Microsoft is making some really good strategic decisions to align themselves and be ready for the “next generation” workplace and client services. Everyone has been talking about BYOx and that everyone will bring their own device and consume business services and functions on that device in parallel to doing personal stuff.
But has BYOD taken off yet?
I personally think that it hasn’t to the extent that many thought it would, there are some companies in some countries that have adopted it for some use cases and user categories, but the majority is still struggling with it though their business apps and functions aren’t really there to support this way of working yet.
Even if they have a NetScaler or similar remote access capabilities with some sort of Desktop and App virtualization (like Citrix XenDesktop) to run the apps it’s still not enough. How do you solve the offline working scenario? And isn’t hosted apps and desktops just a legacy workaround until those business processes have been SaaS’ified? And what about “dropbox” alternatives, H: drives and G: drives, Sharepoint data etc. There is still a user data mess (read my earlier post on this) that needs to be solved and especially a “mega aggregator” tool for getting data/content and synch across devices in a secure manner (data also encrypted at rest on ALL devices and not just mobiles)…
Microsoft is kind of stepping up here I must say from a strategy point of view that makes me believe in them, even though I’ve said that no one ever will take my MacBook Air from me! Have a look at the features that are coming with Windows 8.1 to support a more “semi-controlled” or “semi-trusted” device, and the new cloud services like Azure AD, Windows Intunes offerings in combination with the online messaging and collaboration Office 365 services. And they are apparently also working on a “legacy” cloud service to offer desktops as a service (DaaS) as I wrote in a previous blog post as well.
I think that Microsoft is moving in the right direction towards offering the next generation enterprise IT services and to support the new way of working, and fast!
Have a look at these posts/articles on the news in Windows 8.1:
Everything you need, right from (the) Start
Microsoft is focused on delivering one experience across all the devices in your life. The centerpiece of that strategy and experience are the Microsoft services and apps that come right from (the) Start on your new Windows device.
This is the first blog post in a series that will highlight the apps and services driving toward this “one experience” vision. This experience comes to life through more than 20 new and improved Microsoft apps and services that come as part of Windows 8.1, including a new one that we are announcing today – Skype, right from (the) Start!
It’s where you want to go today….
10 Mobile Device Management Leaders That Help IT Control #BYOD, #Gartner, #Citrix, #MDM
Consumers love their smartphones and tablets, so it should come as no surprise that they want to use their devices at work. The pressure to develop and deploy a bring-your-own-device (BYOD) policy is on and coming from every direction, including the ‘C’ suite of executives who tend to be especially keen on using smartphones and tablets for their work.
Managing devices in a BYOD environment is no small feat, and the right mobile device management (MDM) product is a key component in making it work. Here are 10 leading MDM vendors in the market today, drawn from the leaders and visionaries in Gartner’s 2013 Magic Quadrant for Mobile Device Management Software.
Magic Quadrant
#Citrix #NetScaler #SDX Installation Overview Video
This is a pretty good “quick” video of the SDX installation! Have a look at it, and remember not to use 1Gbps interfaces only if you want to run more than 7 VPX’s on the SDX! Then go for 10Gbps interfaces or many channels/interfaces of 1Gbps to not hit the SR-IOV limit of 7/1Gbps interface! 😉
Description
12:45 screen capture with PPT overview on IP Addressing, and walking through install, IP Change for SDX’s SVM and XS IPs, licenses, and then the install of a NetScaler instance with NSIP and SNIP. This is intended to be a quick overview before you set out on a first SDX install, and is in compliment with the SDX Quick Install Guide.
See the video here!
//Richard
Upgrading to #Citrix #Receiver for #Windows – why and how?
This is something that all Citrix admins should read! How many questions don’t U get about which version of the client to use and why etc?
This document describes the various versions of Receivers for Windows, lists the reasons for upgrading, and recommends best practices for upgrading to the latest version of Receiver based on specific circumstances.
Note: The Online Plug-in 12.x will reach end of its maintenance in March 2013. Customers using Online Plug-in with XenApp 5, XenApp 6.x, XenDesktop 4.x, or XenDesktop 5.x must upgrade to the latest version of Receiver for Windows 3.X prior to that date where practical.
Citrix Receiver is the latest Citrix software you install on Windows end points to gain access to virtualized apps and desktops. It is also regularly installed on virtual desktops to enable access to virtualized apps.
The name of Citrix client software and the built-in functions are changed over the years. The clients in common use today are the Online Plug-in for Windows 12.X and the Receiver for Windows 3.X.
Where the Online Plug-in for Windows 12.X provided Web and PNAgent support, Receiver for Windows 3.X provides additional support. It can be configured for self-service access to applications, VPN-less remote access, single sign-on the Windows, Web, and SaaS applications, and has a built-in method to check for updates.
Both the Online Plug-in and Receiver have two versions.
- The Online Plug-in Web is used solely for Web access to applications and the Online Plug-in (Full) supports Web access as well as PNA Services. The Full version supported SSO, Smart Cards, and access to apps through the Start menu
The standard Receiver for Windows, CitrixReceiver.exe, can be considered is a complete replacement for the Online Plug-in Web and largely a replacement for the Online Plug-in (Full). It can be used for web access. It can be configured to access PNA Services. And it can also be used with the latest versions of StoreFront, CloudGateway (App Controller), and Access Gateway to provide a rich set of services. It contains the latest, multithread, multi-stream HDX engine.
NEW #Citrix Apps and Desktops certifications – #CCIA, #CCE, #CCA, #XenDesktop
Ok, Citrix has now released the new certifications! Have a look, plan, study and take them! 😉
Now in Beta and launching live in early Q4 – a new solutions-focused certification program designed to validate IT professional skills for strategic app and desktop solutions in support of Citrix XenDesktop 7.
- Citrix Certified Associate – Apps and Desktops (CCA-AD) validates the skills IT operators and administrators need to manage, maintain, monitor and troubleshoot XenDesktop 7 solutions.
- Prepare with the Managing Citrix XenDesktop 7 Solutions training course.
- Pass the Managing Citrix XenDesktop 7 Solutions exam.
- Citrix Certified Professional – Apps and Desktops (CCP-AD) validates the skills experienced IT solution builders, such as engineers and consultants, need to install, configure and roll out common XenDesktop 7 solutions.
- Obtain the CCA-AD certification.
- Prepare with the Deploying Citrix XenDesktop 7 Solutions training course.
- Pass the Deploying Citrix XenDesktop 7 Solutions exam.
- Citrix Certified Expert – Apps and Desktops (CCE-AD) validates the skills experienced IT solution designers, such as architects, engineers and consultants need to assess and design comprehensive XenDesktop 7 solutions.
- Obtain the CCP-AD certification.
- Prepare with the Designing Citrix XenDesktop 7 Solutions training course .
- Pass the Designing Citrix XenDesktop 7 Solutions exam.
Update Paths
We have a simple transition path for you.
CCIAs and CCEEs may update to the new equivalent level by passing only one exam. Eligibility to update will require an unexpired credential. The update path for existing CCIAs and CCEEs will be available until this first version of the CCE-AD or CCP-AD exams are retired. We will provide 3 months notice of any changes to the update requirements or update path availability.
Existing Citrix Certified Administrators (CCAs) and Citrix…
Continue reading here!
//Richard
Choose your #Citrix #NetScaler … wisely… – via @hlouwers
This is a question I get a lot and I must say that Henny Louwers did answer it well in this blog post!
I spend a lot of my time breaking down the different models of Citrix NetScaler appliances and different Software Editions within the Citrix NetScaler portfolio.
I decided to set up a blog about this since the path is usually pretty much (lengthy but) the same. This does not mean the answer is always easy because there are a lot of questions that need to be answered.
The first thing I would like to get off my chest is the following: Stop seeing/selling the Citrix NetScaler as a replacement for Secure Gateway. It is so much more than that. I often have discussions with various engineers and consultants telling me that Citrix NetScaler is so expensive for a Remote Access solution because Secure Gateway always used to be free. No offense but a Citrix NetScaler solution belongs to the networking department, not the Citrix XenApp sys admin department. Or maybe limited.
That leads me to the first difficult thing of a Citrix NetScaler project. The adoption of the Citrix NetScaler appliances to the networking guys of an organization. They need to embrace the solution to make this a success. For some reason they too see it as a ‘’Citrix’’ solution. For that reason one of the most important meetings to setup is usually with the networking guys to try to explain the L3-L7 functionality of the Citrix NetScaler solution. When they realize it competes with F5, Juniper, Cisco, etc then we are on the right track.
NetScaler Gateway or NetScaler Standard Edition
Usually the first question of a customer is regarding something simple like replacing the Remote Access solution. Since the NetScaler is going to be the main platform for publishing Citrix publications a NetScaler Gateway can be considered as a valid option. This is when I tell a customer it would be wise to spend a little extra on the NetScaler Standard Edition since this would leverage the solution be having full load balancing capabilities (among others). When you compare prices between the NetScaler Gateway and NetScaler Standard Edition you will see that the Standard Edition will be somewhat more expensive but I for one think that it is worth the difference given the feature set that come with the Standard Edition. Of course the NetScaler Gateway can always be upgraded to a NetScaler Standard Edition (or higher) if you will.
Another feature of Citrix NetScaler Standard Edition is the ability to run Citrix Web Interface on the appliance. Honestly, I do think is not really that important anymore….
Continue reading here!
//Richard
The IT Melting Pot! 