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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Not possible to resize /var/log on vSphere 4 Host

Posted on July 1st, 2009 in Virtualization, vSphere | 2 Comments »

As my previous experienced, if you having a disk space full on /var, the host server will getting an error message such as “A general error occured : Failed to create journal File provider” when creating a new virtual machine. I had my test machine setup as default configuration, which the /var/log only allocated for 2GB in place. Prior to move the system to production, I decide to extend the /var/log from 2GB to 10GB as our current standard. Here come to the idea that I try to extend, unmount and remount as I usually did on the Linux.

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Create VMFS with High Availability and Vmotion in local hard drive

Posted on February 28th, 2009 in Virtualization | No Comments »

I just read an interesting article and wat the demo video for the products of Stor Magic SvSAN which is capable to provide the flexibility for us to utilize the local Hard drive in our machine to act as a share storage. As we know, the 1TB SAS HDD is available in the market today, and most of the ESX servers we have today, are not running with local storages due to the requirement of HA, DRS and VMotion within ESX servers. In the video, it show the flexibility and opportunities to fully utilize the ESX servers we have. I am interesting into this particular products and idea and downloading for a try now.

More review will be publish after my test on this. If the success of this products is true, we should able to save some money for some of the cases which may not require big SAN box to their environment to entitle the HA, DRS and Vmotion features. Stay tune.
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VMFS LUNs Report

Posted on December 4th, 2008 in Storage, Tips | 1 Comment »

Gabesvirtualworld posted Prevent your LUNs running out of space remind me about my VMFS LUNs space. Personally I don’t agreed about create a dummy vmdk on each LUN. Why? Arnim, you still have to wake up at 3am if received any calls. Just a joke!

Have a look here:
VMware ESX VMFS LUNs Report.
San Space

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ESX and VM Guest – Round Robin Storage Setting

Posted on August 25th, 2008 in Virtualization | 4 Comments »

To improve the I/O performance for ESX Virtual Infrastructure, VMware had come out with the round robin option for both ESX and VM guests. Although is an experimental option in the ESX setting today, but I will encourage you all to try this option which provide fail over and load balancing on the storage path to connect to you SAN storage. For VM guests, you will allow allow to use this when you have RDM – Raw Device Mapping option to direct read write to the physical LUN from your SAN storage without using VMFS.

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