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Always been a fan of server virtualisation, simply because of the portability of virtual servers once they have been through the virtual infrastructure sausage machine.
Data Center contingency becomes much easier, its a case of finding the most cost effective way of replicating the virtual servers from storage solution to remote storage solution and then providing the host hardware to run those virtual machine when the shit hits the fan (usually there are network routing and DNS issues to deal with too but hey, it doesn’t half make things easier once you virtualise)
Data replication though, it can be expensive stuff, so can the redundant hardware needed on the remote site, awaiting activitation when a ‘plane lands on your data center’ (not sure how many times that has happened, but always seem to be the number one threat when having discussion on the subject).
Virtualization is a method of running multiple independent virtual operating systems on a single physical computer. It is a way of maximizing physical resources to maximize the investment in hardware. Since Moore’s law has accurately predicted the exponential growth of computing power and hardware requirements for the most part have not changed to accomplish the same computing tasks, it is now feasible to turn a very inexpensive 1U dual-socket dual-core commodity server into eight or even 16 virtual servers that run 16 virtual operating systems. Virtualization technology is a way of achieving higher server density. However.
Desktop virtualization (or Virtual Desktop Infrastructure) is a server-centric computing model that borrows from the traditional thin-client model but is designed to give administrators and end users the best of both worlds: the ability to host and centrally manage desktop virtual machines in the data center while giving end users a full PC desktop experience
Something I have wanted to develop for a while, is an easier mechanism for exporting the whole data store contents of a Citrix XenApp farm, on the fly, with the click of a button.
If you talk to CIOs who really “get” virtualization, the benefit that excites them the most is not cost savings but agility. I’m talking about the ability to say yes, quickly, to a business side request. Virtualization is helping smart IT leaders morph from “no” people to “yes” people. That’s a huge shift for many IT organizations and companies. But in order to be a yes person, you need to have enough carefully-managed virtual infrastructure on hand.
As you may know, VMware recently began the process of acquiring B-hive, but you may not know much about what B-hive does. From the press release, B-hive “gives infrastructure groups visibility into application performance in virtual environments such as end-user transaction response time, virtual machine utilization and cross-virtual machine dependencies.”
Michael Rose, Research Analyst at IDC, discusses the rise of best practices for virtual desktop infrastructures in this executive interview sponsored by Citrix Systems.
Many companies are now talking about virtual desktop infrastructure (VDI) as a way of delivering desktops virtually to end-users. Is this becoming a viable technology for mainstream enterprise customers?
Michael Rose, Research Analyst at IDC, discusses the rise of best practices for virtual desktop infrastructures in this executive interview sponsored by Citrix Systems.
Now that Apple are due to release the 3G iPhone and the development kit, it won’t be too long before a number of different ICA clients are released which will allow you to run Windows applications and Windows Desktops sessions on your iPhone.
Not using the local resource on the iPhone, the Citrix ICA clients allow access using the ICA protocol to a number of different Citrix platforms.
At last, I can now connect my mac to my Citrix Access Gateway! An admin client and EPA client would be nice too…
VMware have release a beta of its up and coming ‘ThinApp’ solution which I have a very strong interest in.
Some key features are:
New to Presentation Server 4.5, Configuration Logging will log all changes made in the Citrix Access Management Console (for the Presentation Server node only) and the Presentation Server Console. So it will log changes to published applications, farm level settings, server level settings, etc. It will not however log changes made using the Password Manager Node, Web Interface Node, or Access Gateway nodes, even though they show up in the Access Management Console.
This article describes how to change the service console IP address, gateway address and hostname on your ESX Server 3.x host. These settings can be changed using the Virtual Infrastructure Client or from the physical or a remote console connection (ILO, RSA, DRAC, etc)
We will be publishing a number of posts over the next couple of months which will provide newcomers to the application delivery and virtual infrastructure space with a better understanding of the products, benefits and usage scenarios.
Here is a quick demonstration video showcasing the new look and feel of Citrix Web Interface 5.
Citrix Access Gateway Advanced Edition is a great product, lots of my time is spent designing, implementing and integrating this product usually with a Citrix XenApp backend which includes Web Interface.
One question seems to always pop up though. Is it resilient and what happens if a component of the infrastructure fails?
Let us take a look at the components required to build the infrastructure and what might happen if one fails. We will start at the front end and work backwards from there (as this is what the client hits first).
What is SmartAuditor?
At the very basic level, it is a recording of an ICA session for playback later. This could be used for troubleshooting (record a user that has intermittent issues for platback later when the issue arises) or compliance (record all users of the HR application to have proof of what session did what). This is 1st rev some of the things you may wish for are not included (Record session on the fly after session has started, searchable files, or the fact you have to disable session sharing to get the thing to work…).
I needed to add more storage space on the /home directory of a Xen guest running on a RHEL5 system. I investigated extending its LUN on the NetApp Filer and then tried running pvresize to see if the Xen guest would recognise the new size. No luck. In the end, i created another iSCSI LUN, mapped it to the Xen host, configured the Xen guest to see the new LUN and let LVM know it had another physical disk to play with. This is how i did it.