February 26, 2015 Leave a comment
Thanks to VMware for confirming my vExpert!
Every cloud has a silver lining.
February 16, 2015 1 Comment
My article about Certificate Lifecycle Management on vSphere 6 has been published with other articles from vExperts from all over the world on VMware VMTN Blog, so thank you VMware for the opportunity :-)
You can check all links here:
February 13, 2015 Leave a comment
There have been a lot of blog posts around warning us that starting from vSphere 5.5 Update2d (build 2403361) TPS will be basically turned off.
Besides comments about the why and how to partially re-enable inter-VM TPS I just think in most cases it might make sense to restore the original behaviour; I have been in the process of upgrading an infrastructure where the RAM contrain represented a much bigger concearn than the specific security reason why TPS has been turned off so I decided to take a look at the shared memory metrics in vCenter just to find out that post-upgrade situation wouldn’t be exactly heavenly if all the shared memory pages would be translated into unique pages.
I found this arcicle KB2097593 where it explains the various status of the settings you can apply and one of them basically disables the new behaviour restoring the old fashion TPS:
In other words setting the value “ShareForceSalting” to 0 will bring things back in time.
The complete procedure is as follows:
1. Log in to ESX (i)/vCenter with the VI-Client.
2. Select ESX (i) relevant host.
3. In the Configuration tab, click Advanced Settings (link) under the software section.
4. In the Advanced Settings window, click Mem.
5. Search for Mem.ShareForceSalting and set the value to 0.
6. Click OK.
7. Reboot host
October 31, 2014 Leave a comment
Some of you might have noticed the badge I’ve added to my Blog.
I have to thank VMware for recognizing my efforts for the community and for awarding me with this title.
Thanks to this and to Corey Romero who granted me a Blogger Pass for VMworld in Barcelona I will be able to write about the conference pretty soon.
October 31, 2014 1 Comment
If you happen to run NetScaler and upgrade to build 2143827 of vSphere 5.5 you will run in very nasty issues.
Specifically, your NetScaler will go bonkers if you enter in the management web interface or even via SSH; in general all things that start a network increase in term of traffic directed to the NetScaler will make it crash.
When it doesn’t crash you will still experience network communication drops, hangs, connectivity issues and such and in a very random fashion too (just to add some fun).
Fortunately VMware gave us a workaround.
To work around this issue, add the line hw.em.txd=512 in loader.conf file.
For deeper details about the issue read KB VMware KB 2092809
October 31, 2014 Leave a comment
I don’t know about you but I found it to be a little weird that there is not way to tell Mirage to move NTUSER.DAT and UsrClass.DAT when performing an hardware migration.
Considering Mirage uses USMT to migrate the user state mean that this is a precise choice from VMware and not a technological limitation.
Those two files include two pretty important user settings: the user portion of the registry and the user class of the registry.
If you want to have the migrated workstation to have exactly the same look and feel, including the customization of the single applications settings, icon positioning on the desktop and so on you definitely want to apply NTUSER.DAT and UsrClass.DAT as well; I am sure there are scenarios where you don’t want this but there are also scenarios but if you want you should be able to do it.
In the Factory Defaults this is explicitly forbidden, so if you want to apply NTUSER.DAT and UsrClass.DAT too you need to follow this procedure:
When editing the file, you can search for “NTUSER” and “UsrClass.dat” and just remove the lines with “”.