Archive for the ‘General’ Category

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Choosing a thin client OS for XenDesktop

March 6, 2010
Feature Windows
XPe 		Linux Wyse ThinOS with TCX Comments
Flash Redirection Yes No No Wyse ThinOS with TCX supports flash acceleration which is not as desirable as flash redirection.
Multimedia Redirection Yes Yes Yes All clients support multimedia redirection for video codecs such as wmv, mpeg and avi.
USB Remoting Yes Yes Yes All clients support isochronous USB remoting such as Webcams and offer USB PDA sycronization.  Wyse ThinOS utilizes the TCX software.
VOIP – Optimized Speech codec Yes Yes No XPe and Linux client support the new Citrix speech codec.  Wyse ThinOS uses TCX Rich Sound which is less desirable.
WAN – Branch Repeater Client Yes No No Only XPe clients support the Branch Repeater Client, but the Linux client supports HDX IntelliCache WAN Optimization.   Wyse has a Virtual Desktop Accelerator for software WAN acceleration. 
HDX 3D Graphics Yes Yes No The Linux client does not support decoding of GPU-compressed data streams.

http://community.citrix.com/display/ocb/2010/03/01/Choosing+a+Thin+Client+OS+for+XenDesktop

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Cannot Reattach XenServer Storage Repository

February 28, 2010

I’ve recently encountered a situation when reattaching a forgotten (or otherwise unknown) LVMoHBA or LVMoISCSI SR where you are presented with a dialog which tells you that a previous SR has been found and that you need to select either to “Reattach” or to “Format” the device in order to proceed.

Here’s the rub (and the problem) – the buttons you need to press aren’t present.

This has occurred to me using XenCenter 5.5.2, on Windows 7. I expect it could also occur on Windows 2008, particularly on the R2 version. It might occur with other revs of XenCenter.

Here’s the work around – Run XenCenter 5.5.2 (or whatever is right for your environment) on Windows XP or Server 2003. The dialog will display properly and you will be able to complete the reattach process.

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1 million IOPS and iSCSI

February 25, 2010

Just an article telling everyone something we at Lewan already know…a properly designed iSCSI storage environment performs great.

http://blogs.technet.com/virtualization/archive/2010/02/25/Guest-post_3A00_-Intel-discusses-iSCSI-and-1-million-IOPs.aspx

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VMware Acquiring Zimbra

January 13, 2010

I thought this was interesting.. VMware announced Tuesday that they are acquiring Zimbra, makers of the Zimbra Collaboration Suite that is well known for a Linux and Mac OS email server, shared calendar and collaboration software (think Microsoft Exchange but for the Linux & Mac)..

A good write up can  be seen over at the Tuaw Blog, here:
http://www.tuaw.com/2010/01/13/zimbra-and-vmware-get-married-cloud-shaped-kids-expected/

VMware Press Release:
http://www.vmware.com/company/news/releases/zimbra.html

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Is anyone using IPv6?

January 7, 2010

Just curious if anyone is using IPv6 or has plans to transition to some IPv6 in 2010?  Comment if you are…

Here’s an article speaking to the slow adoption of IPv6 and in the US we have the majority of the IPv4 addresses, no wonder we’re not in a hurry.

http://www.networkcomputing.com/data-center/the-road-to-ipv6-is-paved-with-nats.php

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Using the Fastest DNS Servers Possible

December 11, 2009

It probably doesn’t apply to most of our readers/customers at work, but at home it sure might.

I saw an article saying that Google released some public DNS servers that are supposed to be super fast, which will speed up your web browsing experience.

Now, here’s an article that mentions a tool called “Namebench” which will search for the fastest DNS servers based on your network and location and will list them for you (if that be Google’s or someone else’s’).

http://lifehacker.com/5420931/namebench-helps-you-find-the-fastest-dns-server-for-your-computer

 I ran it at home and it showed my fastest DNS servers were one from Level 3 and one from Comodo Secure DNS (faster than Comcasts’ DNS servers). So I changed my Linksys router at home to use these 2 DNS servers on the WAN link and also setup my DHCP scope to use my router plus these DNS servers. The results are noticeable– browsing is way faster and I’d recommend checking it out!

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Upgrading from vSpehere 4.0 to 4.0U1 on HP Proliant

November 29, 2009

I just stumbled across something which I thought might be more than helpful to a few of us. VMware has a documented issue when upgrading vSphere 4.0 when the HP Insight Manager agents are installed on the host. The short version is that the Insight Manager services must be disabled before attempting to upgrade the host, or the host can be left in an unstable partially upgraded state.

The full article can be found here: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1016070

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Setting Up FCOE on a Nexus 5000

October 26, 2009

Scott Lowe posted yesterday on how to setup Fibre Channel over Ethernet (FCOE) on a Cisco Nexus 5000. He made a very easy to follow How-To guide, which is located here:

http://blog.scottlowe.org/2009/10/25/setting-up-fcoe-on-a-nexus-5000/

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So what will the impact of Exchange 2010 have on the archiving industry?

October 23, 2009

I’ve heard several “rumblings” from Microsoft as well as other “Archiving Solution” vendors regarding their take on Exchange 2010′s built-in archiving features.

I thought Martin over at Archiving101.com has posted a great write-up about this topic. If you are considering on waiting for Exchange 2010′s archiving capability to do your corporate archiving and E-Discovery, I’d recommend you take a look at his post.

http://www.archiving101.com/?p=178

Take care!

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Provisioning with iSCSI and Solaris ZFS in 10 Minutes

October 21, 2009

Here is a great Wiki article from Sun explaining how to work with iSCSI on Solaris as well as working with the ZFS filesystem on iSCSI devices:

http://wikis.sun.com/display/BluePrints/Provisioning+with+iSCSI+and+Solaris+ZFS+in+10+Minutes

Here is also a link for a HP Lefthand document which describes how to expand a Solaris UFS File System on the fly.
HP Lefthand How To – Expand a Solaris UFS File System on the Fly

Here’s a great Sun article on using Multipath (MPIO) on Solaris with iSCSI:
http://docs.sun.com/app/docs/doc/819-2723/fncpc?l=en&a=view

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