Archive
True Scale Out Shared Nothing Architecture – #Compute, #Storage, #Nutanix via @josh_odgers
This is yet another great blog post by Josh! Great work and keep it up! 😉
I love this statement:
I think this really highlights what VMware and players like Google, Facebook & Twitter have been saying for a long time, scaling out not up, and shared nothing architecture is the way of the future.
At VMware vForum Sydney this week I presented “Taking vSphere to the next level with converged infrastructure”.
Firstly, I wanted to thank everyone who attended the session, it was a great turnout and during the Q&A there were a ton of great questions.
I got a lot of feedback at the session and when meeting people at vForum about how the Nutanix scale out shared nothing architecture tolerates failures.
I thought I would summarize this capability as I believe its quite impressive and should put everyone’s mind at ease when moving to this kind of architecture.
So lets take a look at a 5 node Nutanix cluster, and for this example, we have one running VM. The VM has all its data locally, represented by the “A” , “B” and “C” and this data is also distributed across the Nutanix cluster to provide data protection / resiliency etc.
So, what happens when an ESXi host failure, which results in the Nutanix Controller VM (CVM) going offline and the storage which is locally connected to the Nutanix CVM being unavailable?
Firstly, VMware HA restarts the VM onto another ESXi host in the vSphere Cluster and it runs as normal, accessing data both locally where it is available (in this case, the “A” data is local) and remotely (if required) to get data “B” and “C”.
Secondly, when data which is not local (in this example “B” and “C”) is accessed via other Nutanix CVMs in the cluster, it will be “localized” onto the host where the VM resides for faster future access.
It is importaint to note, if data which is not local is not accessed by the VM, it will remain remote, as there is no benefit in relocating it and this reduces the workload on the network and cluster.
The end result is the VM restarts the same as it would using traditional storage, then the Nutanix cluster “curator” detects if any data only has one copy, and replicates the required data throughout the cluster to ensure full resiliency.
The cluster will then look like a fully functioning 4 node cluster as show below.
The process of repairing the cluster from a failure is commonly incorrectly compared to a RAID pack rebuild. With a raid rebuild, a small number of disks, say 8, are under heavy load re striping data across a hot spare or a replacement drive. During this time the performance of everything on the RAID pack is significantly impacted.
With Nutanix, the data is distributed across the entire cluster, which even with a 5 node cluster will be at least 20 SATA drives, but with all data being written to SSD then sequentially offloaded to SATA.
The impact of this process is much less than a RAID…
Continue reading here!
//Richard
Solving the Compute and Storage scalability dilemma – #Nutanix, via @josh_odgers
The topic of Compute, Network and STORAGE is a hot topic as I’ve written in blog posts before this one (How to pick virtualization (HW, NW, Storage) solution for your #VDI environment? – #Nutanix, @StevenPoitras) … and still a lot of colleagues and customers are struggling with finding better solutions and architecture.
How can we ensure that we get the same or better performance of our new architecture? How can we scale in a more simple and linear manner? How can we ensure that we don’t have a single point of failure for all of our VM’s etc..? How are others scaling and doing this in a better way?
I’m not a storage expert, but I do know and read that many companies out there are working on finding the optimal solution for Compute and Storage, and how they can get the cost down and be left with a more simple architecture to manage…
This is a topic that most need to address as well now when more and more organisations are starting to build their private clouds, because how are you going to scale it and how can you get closer to the delivery that the big players provide? Gartner even had Software-Defined-Storage (SDS) as the number 2 trend going forward: #Gartner Outlines 10 IT Trends To Watch – via @MichealRoth, #Nutanix, #VMWare
Right now I see Nutanix as the leader here! They rock! Just have a look at this linear scalability:
If you want to learn more how Nutanix can bring great value please contact us at EnvokeIT!
For an intro of Nutanix in 2 minutes have a look at these videos:
Overview:
True or False: Always use Provisioning Services – #Citrix, #PVS, #MCS
Another good blog post from Daniel Feller:
Test your Citrix muscle…
True or False: Always use Provisioning Services
Answer: False
There has always been this aura around Machine Creation Services in that it could not hold a candle to Provisioning Services; that you would be completely insane to implement this feature in any but the simplest/smallest deployments.
How did we get to this myth? Back in March of 2011 I blogged about deciding between MCS and PVS. I wanted to help people decide between using Provisioning Services and the newly released Machine Creation Services. Back in 2011, MCS an alternative to PVS in that MCS was easy to setup, but had some limitations when compared to PVS. My blog and decision tree were used to help steer people into the PVS route except for the use cases where MCS made sense.
Two and a half years passed and over that time, MCS has grown up. Unfortunately, I got very busy and didn’t keep this decision matrix updated. I blame the XenDesktop product group. How dare they improve our products. Don’t they know this causes me more work? 
It’s time to make some updates based on improvements of XenDesktop 7 (and these improvements aren’t just on the MCS side but also on the PVS side as well).
So let’s break it down:
- Hosted VDI desktops only: MCS in XenDesktop 7 now supports XenApp hosts. This is really cool, and am very happy about this improvement as so many organizations understand that XA plays a huge part in any successful VDI project.
- Dedicated Desktops: Before PVD, I was no fan of doing dedicated VDI desktops with PVS. With PVD, PVS dedicated desktops is now much more feasible, like it always was with MCS
- Boot/Logon Storms: PVS, if configured correctly, would cache many of the reads into system memory, helping to reduce the Read IOPS. Hypervisors have improved over the past 2 years to help us with the large number of Read disk operations. This helps lessen the impact of the boot/logon storms when using MCS.
Remote Desktop Services are now allowed on #Windows #Azure – #RDS, #TS, #XenDesktop
This is a great thing that you should have a look at and investigate how it would fit you and your organization! Finally Microsoft has changed the license model! They still have some work to be done on it though so we can run Virtual Desktops (VDI’s) as well!! 😉
Read this great blog post from lpanzano:
I’ve not seen a lot of news about this so I thought it was worth writing a short post just to remember everyone that on July 1st, Microsoft has officially changed Windows Azure licensing terms (PUR) to allow the use of Remote Desktop Services (RDS) on Windows Azure Virtual Machines. Previously this scenario was not allowed in Windows Azure. Before July 1st you could only access an Azure Windows Server VM for purpose of server administration or maintenance (up to 2 simultaneous sessions are authorized for this service).
Let’s see some details about this change:
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To enable more than 2 simultaneous sessions you will need to purchase RDS Subscriber Access Licenses (SALs) through the Microsoft Services Provider Licensing Agreement (SPLA) for each user or device that will access your solution on Windows Azure. SPLA is separate from an Azure agreement and is contracted through an authorized SPLA reseller. Click here for more information about SPLA benefits and requirements.
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RDS Client Access Licenses (CALs) purchased from Microsoft VL programs such as EA, do not get license mobility to shared cloud platforms, hence they cannot be used on Azure.
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Windows ‘Client’ OS (e.g. Windows 8) virtual desktops, or VDI deployments, will continue to not be allowed on Azure, because Windows client OS product use rights prohibit such use on multi-tenant/shared cloud environments.
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Customers can use 3rd party application hosting products that require RDS sessions functionality (e.g. Citrix XenDesktop), subject to product use terms set by those 3rd party providers, and provided these products leverage only RDS session-hosting (Terminal Services) functionality. Note that RDS SALs are still required when using these 3rd party products.
Continue reading this post here!
Citrix also created a good blog post on their view of the top 5 scenarios for putting XenDesktop on Azure:
Top 5 Scenarios for XenDesktop on Windows Azure
Since Windows Azure launched I have looked forward to the day Citrix would be able to work jointly with Microsoft to support XenDesktop and XenApp workloads. We are excited that today is the day we announce support for XenDesktop 7 and XenApp 6.5 on Windows Azure. Customers can now take advantage of the leading Citrix desktop virtualization solution and all of the HDX user experience goodness on Microsoft’s leading public cloud. With the announcement we’ve published two design guides (here andhere) to help get you started with your deployments.
#Apache #CloudStack grows up – #Citrix, #IaaS – via @sjvn
On June 4th, the 4.1.0 release of the Apache CloudStack Infrastructure-as-a-Service (IaaS) cloud orchestration platform arrived. This is the first major CloudStack release since its March 20th graduation from the Apache Incubator.
It’s also the first major release of CloudStack since Citrix submitted the project to the Apache Foundation in 2012. Apache CloudStack is an integrated software platform that enables users to build a feature-rich IaaS. Apache claims that the new version includes an “intuitive user interface and rich API [application programming interface] for managing the compute, networking, accounting, and storage resources for private, hybrid, or public clouds.”
This release includes numerous new features and bug fixes from the 4.0.x cycle. It also includes major changes in the codebase to make CloudStack easier for developers; a new structure for creating RPM/Debian packages; and completes the changeover to using Maven, the Apache software project management tool.
Apache CloudStack 4.1.0’s most important new features are:
- An API discovery service that allows an end point to list its supported APIs and their details.
- Added an Events Framework to CloudStack to provide an “event bus” with publish, subscribe, and unsubscribe semantics. Includes a RabbitMQ plug-in that can interact with AMQP (Advanced Message Queuing Protocol) servers.
- Implement L3 router functionality for the VMware Nicira network virtualization platform (NVP) plug-in
- Support for Linux’s built-in Kernel-based Virtual Machine (KVM) virtualization with NVP L3 router
functionality. - Support for AWS (Amazon Web Service) style regions
What all this adds up to, according to CloudStack Project Management Committee (PMC) member Joe Brockmeier, is that today’s CloudStack is “a mature, stable project, [that] is also free as in beer and speech. We believe that if you’re going to be building an IaaS cloud for private or public consumption, you’ll be better served choosing an open platform that any organization can participate in and contribute to.”
Brockmeier concluded, “CloudStack is a very mature offering that’s relatively easy to deploy and manage, and it’s known to power some very large clouds–e.g., Zynga with tens of thousands of nodes–and very distributed clouds–such as DataPipe, which…
Continue reading here!
//Richard
#Microsoft finds a new way to deliver a private #cloud in a box – #Azure via @maryjofoley
Interesting!!!! 🙂
It took three years from when it was first announced, but Microsoft may have found a way to deliver a private cloud in a box.
The company’s vision and strategy for doing this has gone through many twists and turns.
Microsoft’s original plan was to provide its largest partners and even a few, select enterprise users a so-called Azure Appliance. Announced in 2010, the Azure Appliances were to be carried by Dell, Fujitsu and HP. These OEMs were to provide the servers which could be installed in partner and select enterprise customers’ datacenters. Microsoft was supposed to provide and maintain Windows Azure as a service to these servers.
The only partner that ever delivered an Azure Appliance was Fujitsu, which announced availability in August 2011. But some time in the past few months, Microsoft ended up dropping its Azure Appliance plans, without ever officially announcing it was dead.
WOW! – MS readies ‘Mohoro’ Windows desktop as a service – #BYOD, #DaaS – via @brianmadden
What can you say!?!? It wouldn’t surprise me a bit!! Of course Microsoft would come out with an Azure based cloud offerings of Desktops as a Service! I will follow this progress for sure, interesting and NOT so nice for quite a number of partners out there…
Summary: Microsoft is believed to be building a Windows Azure-hosted desktop virtualization service that could be available on a pay-per-use basis.
In yet another example of its growing emphasis on remaking itself as a devices and services company, Microsoft looks to be developing a pay-per-use “Windows desktop as a service” that will run on Windows Azure.
The desktop virtualization service, codenamed Mohoro, is in a very early development phase, from what I’ve heard from sources. I don’t know the final launch target, but I wouldn’t be surprised if it isn’t until the second half of 2014.
Mohoro is a town located on the island of Grande Comore in the Comoros Islands in the Indian Ocean. Given that members of the Microsoft India Development Center may be playing a key role in Mohoro’s development, according to my sources, the codename choice seems appropriate.
Microsoft owns the Mohoro.com and Mohoro.Net domain names.
Mohoro, like another Windows service, Windows Intune, is a product of Microsoft’s Server and Tools unit, I hear. Windows Intune is still not yet hosted on Windows Azure (as far as I know), but supposedly the plan is to move it to Azure at some point. Windows Intune already does make use of Windows Azure Active Directory as its directory and authentication service.
The same way that Windows Intune is the cloud complement to System Center, Mohoro seems to be the cloud version of Remote Desktop/Remote App.
This is like “Remote App as a hosted service,” said one of my contacts. It could be for companies who want thin clients or to run legacy apps on new PCs. Right now, companies have to have their own servers in the equation to do this, but “with Mohoro, you click a few buttons, deploy your apps, use Intune to push out configuration to all of your company’s devices, and you’re done,” my contact added.
Microsoft currently offers multiple ways for users to access their Windows desktops remotely via different virtualization technologies and products.
The aforementioned Remote App/Remote Desktop allows Windows users to connect to a remote Windows PC and access resources from it. On the Windows RT front, given that operating system’s restrictions on use of almost any existing Win32 applications, Remote Desktop provides a way for users to continue to use apps they already have on new hardware like the Microsoft Surface RT. Licensing of Remote Desktop and Remote Desktop Services is complex, however, and requires access to server infrastructure on the back-end.
Currently, it is not possible under Microsoft’s licensing terms to run Windows client in virtual machines hosted on Windows Azure. (The new Azure VMs do allow…
Continue to read this great blog post by Mary Jo Foley here!
//Richard
#Windows #Azure Virtual Machines and Virtual Network now are generally available
As I use to write; THIS IS INTERESTING! I think that Microsoft will take some market share for sure with their cloud service offerings!
Windows Azure Virtual Machines and Virtual Network now are generally available. We have new prices for Virtual Machines, Virtual Network, and Cloud Services.
Today is a major milestone for Windows Azure and all of our customers and partners. We are excited to announce that Windows Azure Virtual Machines and Windows Azure Virtual Network now are generally available. We also want to update you on new prices for Virtual Machines, Virtual Network, and Cloud Services.
Virtual Machines and Virtual Network help you meet changing business needs by providing on-demand, scalable infrastructure. These infrastructure services enable you to extend your data centers and workloads into the cloud while using your existing skills and investments. With these services, you can:
- Provision Microsoft SharePoint farms in minutes without up-front hardware investments. Integrate full-trust code to run rich apps and provide Internet-facing collaboration sites.
- Prototype your newest app or extend data marts into the cloud using Virtual Machines as a robust infrastructure for Microsoft SQL Server software. Scale on demand and connect to your on-premises infrastructure using Virtual Network.
- Embrace rapid innovation using the cloud for development and test scenarios. You can spin up any test lab or sandbox quickly, and be agile in your learning, development, and prototyping.
Let’s take a closer look at the news that we are announcing today with general availability.
New high-memory instances for Virtual Machines
When your apps need more memory, new 28-gigabyte (GB) and 56-GB instances deliver.
Updated SLA
When you deploy multiple instances of Virtual Machines, Microsoft provides a financially backed 99.95 percent monthly service level agreement (SLA).
Customer support
Our customer support team is ready and available to help you troubleshoot 24 hours a day, seven days a week. We have several support plans tailored to meet your needs—from basic developer support to Premier Support. When you work with Microsoft, you have a single vendor to call for cloud and on-premises needs.
Validated workloads
The best of Microsoft server products are validated to run on Virtual Machines, including Microsoft Dynamics NAV 2013, SharePoint Server 2013, BizTalk Server 2013, and more. We also offer prebuilt virtual machine images—such as BizTalk Server and SQL Server—through the Windows Azure Virtual Machines Image Gallery with hourly pricing. Prebuilt Linux images—such as CentOS, Ubuntu, and Suse Linux Enterprise Server (SLES)—are available in the Image Gallery from commercial distributors. In addition, a wide variety of the most popular open source applications are available as prebuilt images in VM Depot, a self-service community portal. Read more…
Top 5 #Citrix #XenServer Questions from the Citrix Master Class
Below are the top 5 XenServer questions raised from the Citrix Master Class posted by Amanda Saunders!
Let’s face it, XenServer has been around for quite a while. Citrix purchased the hypervisor back in 2007 and released it entirely free to the market in 2009. Since then, we’ve seen over 1 million downloads of the product and mass adoption in all sorts of businesses from SMBs to the largest service providers. Despite all this, we had almost 700 first time attendees on our XenServer Master Class last week taking a look at what this product has to offer. The newbies were joined by 300 additional Master Class veterans who continue to return to see what we’ll be showing off this time on our British radio show inspired, tech webinar. All of the attendees joined in to keep us busy, asking hundreds of questions for our XenServer experts to answer live on the webinar. If you missed it, watch the recording and read a summary of the top questions asked by the audience.
Why are cloud providers choosing XenServer to power their clouds?
This question could have an entire blog post dedicated to it, but I will try to address it as simply as possible. Currently 80% of Citrix CloudPlatform and Apache CloudStack environments are built on top of Xen or XenServer. Why? The high level reasons are scalability and cost*.
Scalability comes from XenServer’s fully replicated architecture across all hosts in an environment. This means there is no management server required to manage a given number of hosts. Should the master host in a pool go down, any other host can be promoted to replace it with no loss of functionality or configuration. In practice, this means cloud providers can freely choose to cluster hosts as required without incurring any additional configuration or management complexity based on cluster size.
While cost is an important factor for every company to consider, it is particularly important when you’re looking at licensing hundreds or even thousands of hosts. Both the open source version of XenServer and the premium version of XenServer that is included as part of your CloudPlatform entitlement, mean cloud providers can get the virtualization layer of their cloud at no cost. These savings can then be turned into additional differentiated service offerings or added savings to their end user.
*other reasons include open source base, flexibility, VM density and tenant isolation.
XenMotion, what is it and is it free?
We have a competitor in the space who likes to use “v” in a lot of their feature names. A good rule of thumb to find the corresponding feature in XenServer is to replace “v” with “Xen”. XenMotion is our live migration feature that allows you to move VMs from one host in a pool to another provided that the pool has shared storage attached. This has been available in our free version since 2009.
Storage XenMotion is a brand new feature that we released with XenServer 6.1. This feature enables you to move VMs between hosts without the requirement of shared storage which lessens the hardware requirement/expense for both cloud providers using commodity hardware and SMBs with smaller environments. Storage XenMotion is available in our advanced version of XenServer.
Is there an easy way to get support for my environment, even if I’m running on free?
For those of you running a premium edition of XenServer (Advanced, Enterprise and Platinum) we recently changed our support model to offer unlimited, 24×7 support for paid editions of XenServer at about 7% of license cost. What does this mean to the free users out there? Well, it means you can no longer purchase support from Citrix for your XenServer environment. That being said, in addition to the incredible support you can get on the forums, we’ve also introduced a new Citrix Auto Support tool that can do a sanity check of your environment. Simply upload a log file and we’ll check for any issues that we recognize including missing patches, known bugs or configuration errors. This tool can be used for both free or paid editions, so try it out for yourself at http://taas.citrix.com.
What is MonitorIT?
A big thank you to our friends at Goliath Technologies who demoed their brand new version of MonitorIT on our XenServer Master Class. This solution delivers proactive monitoring of your entire environment right out of XenCenter or directly from a browser. What do we mean by “entire environment”? Virtual servers, physical servers, VDI, applications, databases, log management, network, storage, data center components, workstations – EVERYTHING! Do you have multiple hypervisors in your environment? Monitor your vSphere clusters straight from your XenCenter console using this product. You can go one step further and have MonitorIT proactively make changes to alleviate bottlenecks in your environment so the business can keep doing business without interruption. Don’t take my word for it, check out their free trial for yourself. They’ve even opened up their early access program so you can access all the great new features that…
Continue reading here!
//Richard
PVS support in XenServer 6.1 – via @_POPPELGAARD – #XenServer, #Citrix, #PVS
Good blog post from Thomas Poppelgaard!
And this is something that many have waited for, either they upgraded and ran into the issues and had to revert back to 6.0.2… but now it’s fixed! 🙂
Citrix have released Hotfix XS61E009 & XS61E010 for XenServer 6.1 and now you are able to have Citrix Provisioning Services with XS 6.1 and use VVS.
I have been waiting for this for a while.
Issues Resolved In This Hotfix XS61E009
- Virtual Machines (VMs) with out of date XenServer Tools, may not be flagged as “out of date” in XenCenter. This hotfix resolves this issue and enables customers to be notified in XenCenter when new XenServer Tools are available.
- Booting a Citrix Provisioning Services (PVS) target device using a Boot Device Manager (BDM) image can take an extended time to complete. This hotfix resolves this issue.
Issues Resolved In This Hotfix XS61E010
- Customers using XenServer Platinum Edition to license Citrix Provisioning Services (PVS) may find that one PVS license per VM is checked out, rather than one PVS license per XenServer host. This may lead to a shortage of PVS licenses and an inability to provision VMs. Installing this hotfix along with CTX135672 – Hotfix CPVS61016 (Version 6.1.16) – For Citrix Provisioning Services 6.1 – English resolves this issue.
- Attempts to shut down Microsoft Windows Vista and later VMs can cause intermittent blue screen errors, with a "STOP: 0x0000009f..." error message.
- Adding more than eight NICs to Microsoft Windows Vista and later VMs, using the xe CLI can lead to a blue screen error on reboot.
- Copying data to a Microsoft Windows 2003 VM can cause the VMs to hang and lead to a grey screen error.
- When Dynamic Memory Control (DMC) is enabled, attempts to migrate Microsoft Windows XP and later VMs using XenMotion can cause the VMs to hang and lead to blue screen error.
- When the Citrix Xen Guest Agent service is running, Cut and Paste will not work between a XenDesktop virtual desktop and the endpoint device.
- Microsoft Windows XP and later VMs may hang during the boot process and may have to be forced to reboot.
- Attempting to install or upgrade the XenServer Tools on Microsoft Windows Vista and later VMs, which do not have access to a paravirtualized or an emulated network device can cause the installation process to hang.
- Manually installing the Legacy XenServer Tools without changing the device_id to 0001 can result in a "STOP: 0x0000007B..."error when rebooting a Windows VM. After installing this hotfix, customers will not be able to manually install the Legacy XenServer Tools by running xenlegacy.exe…
Continue reading here!
//Richard
The IT Melting Pot! 