Archive for October, 2010

Storage De-duplication

Posted on October 20th, 2010 in Data Center, Hardware, Storage, Virtualization | No Comments »

Storage de-duplication is not a new term in the IT industry. It had been a while since few years back. Many users are confused with this term. Same goes to the Cloud Computing.  Every Storage vendor will claim they have the de-duplication solution today, but they are different from each others as we know.

General de-duplication solution:

  1. Primary SAN de-duplication
  2. Appliance target base de-duplication
  3. Host base de-duplication
  4. Software base de-duplication

I may had missed out some of them, but these should cover majority of the de-deduplication solution in the market today.

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Maximize CPU utilization on ESX host with Cisco UCS B250M2

Posted on October 16th, 2010 in Server, Tips, vCenter, Virtualization, vSphere | 4 Comments »

We were doing some stress test with more than 15 VMs on a single B250M2 Cisco UCS blade machine with 2 x Intel 6 Cores 2.93Ghz, and 192GB memory. While are stress test are pretty simple, each VM been provisioned with 2 vCpu and 4GB of physical memory. We maximize the CPU load of all the virtual machine and end up I was able to capture the print screen as attach here.

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Bugs on Virtual to Virtual Migration from Microsoft to VMware

Posted on October 9th, 2010 in Tips, vSphere | No Comments »

Recently had found some weird issue while we tried to migrate virtual to virtual from Microsoft Virtual Server 2005 to VMware vSphere 4. The import process done successful by the VMware converter, but we realized the network packets get delay while we performed the continues ping test to the virtual machine. the Ping respond had been delayed more than 1000ms in the LAN environment.
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Great Post about NUMA Hyperthreading in ESX 4.1

Posted on October 8th, 2010 in Tips, Virtualization, vSphere | No Comments »

As you may aware, significant improvement had been done on the latest hypervisor from VMware vSphere 4.1.
1 of the key changes are the vCPU for each virtual machine with latest NUMA hyperthreading architecture.

I found a very details and great post talk about this topic, please read the full post from here.

This will significant improve the Consolidation ratio and performance over the virtual machine VS the previous version ESX 4.0.

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How to make APC PCNS 2.2.4 work with ESXi 4.1

Posted on October 7th, 2010 in ESXi, Tips | 2 Comments »

For the past 1 week, I have been busy with the APC PCNS and ESXi 4.1 and I would like to share my experience “How to make APC PCNS 2.2.4 work with ESXi 4.1″ here.

Basically I will not discuss How To Install PowerChute Network Shutdown on VMware ESX /ESXi again and you may refer to APC official link here.

If you’re try to install APC PCNS 2.2.4 on vSphere Management Assistant (vMA) 4.1 and I’m sure you will get the similar error like “This version of PowerChute Network Shutdown only support VMware ESXi” which I think APC teams should it much more clear. The error message caused by APC PCNS (ver 2.2.4) setup file – “” which check on “/etc/vima-release” file. In the vMA 4.1 released, you’re can only found “/etc/vma-release” file which changed recently. Create a symbolic link or edit the installation script can temporary ignore these error message. See this link.
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