Archive for August, 2010

vSphere 4 kernel problem?

Posted on August 20th, 2010 in vSphere | No Comments »

Yesterday, I did an APC PCNS installation for 4 unit of VMware vSphere 4 on my customer site and one of the ESX host go wild.

For some reason, I can’t login and the particular ESX host was disconnect for few minutes on vCenter server. Again, the console fly tons of weird error message for few minutes as screen shot below.

vSphere 4 console
click to enlarge.
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Import Virtual Machine with VMware Converter 4

Posted on August 20th, 2010 in Tips, vCenter, Virtualization | 2 Comments »

New finding while trying to import the existing virtual machine from ESX 3.5 to vSphere 4 ESX host. I got an image from previous ESX 3.5 which is running hardware version 4. I was trying to import it to the new ESX 4.0 through the import wizard, and been failed for couple of times. During the wizard, it allow you to change the virtual machine name, thin provision, disable unnecessary services and upgrade to virtual hardware version 7. I had selected the necessary configuration but non of it were success. It had always failed at the stage of 12 % during the import process. I even had browse the datastore to monitor the progress, for unknown reason, the task will be failed for no reason, which not even a packet was drop during the process.

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Storage vMotion with VAAI on EMC

Posted on August 16th, 2010 in Storage, Tips, vCenter, Virtualization, vSphere | No Comments »

In 1 of the demo video, I had seen the storage vMotion performance significant improve as much as 25% of the time and reduce the storage processor overhead at roughly 20% which offload the ESX performance during the storage vMotion execution. Previously, you may aware that the storage vMotion will usually take a long time and consume a lot of resource from Host & Storage. With vStorage API Array Integration, you will able to offload this to the storage array to handle directly which reduce the system overhead from ESX host itself.

Here is the option to turn on or off the VAAI, Value of Zero meant off, and 1 refer to ON.

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VSI Plug-in for vCenter with EMC storage

Posted on August 11th, 2010 in Storage, Tips, vSphere | 1 Comment »

The new VSI plugin from EMC allow VMware administrator to self service, manage and provide transparency and visibility about the back end SAN storage in the vSphere infrastructure. This had transformed the traditional way how the VMware administrator manage and operate the virtual infrastructure in the past. All of us may agreed that the SAN configuration details are not visible to us previously due to lack of visibility in the management console. If you would like to verify something on the SAN, you may require assistant from the SAN admin, due to restricted access to the SAN box. Now with the new VSI plug-in, it will able to provide the necessary configuration information to the VMware administrator without having to engage the SAN admin to verify some minor information. The VSI plugin support all platform for EMC product range include Clariion, Celerra and Symmetrix.


Here show the plug-in which integrated the the vi-client directly

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VMware VMFS Versioning

Posted on August 4th, 2010 in Tips, vSphere | No Comments »

VMware VMFS VMware VMFS (Virtual Machine File System) is VMware, Inc.’s cluster file system designed for VMware Infrastructure or VMware vSphere. Basically VMFS used to store virtual machine disk images, including snapshots.

According to Wikipedia,

  • VMFS version 1 was used by ESX Server v1.x, which is no longer sold. It didn’t feature the cluster filesystem properties and was used only by a single server at a time. VMFS1 is a flat filesystem with no directory structure. — Officially named “VMware File System”
  • VMFS version 2 is used by ESX Server v2.x and (in a limited capacity) v3.x. VMFS2 is a flat filesystem with no directory structure. — Officially named “VMware File System”
  • VMFS version 3 is used by ESX Server v3.x and vSphere (4.x). As a most noticeable feature, it introduced directory structure in the filesystem. Older versions of ESX Server cannot read or write VMFS3 volumes. Beginning from ESX 3 and VMFS3, virtual machine configuration files are stored in the VMFS partition by default. — Officially named “VMware Virtual Machine File System”

In order to know the exact VMFS version number, see below:
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