Archive for the ‘Operating Systems’ Category

How to add new volume in VM online (SLES)

Posted on November 3rd, 2008 in Operating Systems, Storage, Tips | No Comments »

Your customer want you to add a new volume in one of the VM SLES server but can not affort down time? No worry, you can do that easily with ESX.

Below is step by step guide with screen captured from the VM (my test machine is running on SLES10 SP2):

Tip: It is best to do a snapshot before you start this task, incase anything goes wrong.

This is my test VM machine. It is having one disk at beginning.

1) This is my test VM machine. It is having one disk at beginning.

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SAP on VMware with SUSE Linux

Posted on November 1st, 2008 in Data Center, Hardware, Operating Systems, Virtualization | No Comments »

SAP on VMware is hot but not new in the industry today. Many of us as the IT architect are seeking opportunity from time to time to reduce the IT spending but improving the productivity to the business. I would like to share my experience for SAP on VMware.

SAP always have their internal certify program which certify from software to hardware level to ensure their users are compliance with the application requirement for the SAP deployment. You will see a big range of choice you can choose from the certify list from Unix, Linux to Windows as an example. On my case, we choose Novell SUSE Linux as we have a good relation with Novell which require minimum amount of software subscription to run our environment. At the same time, the latest version of SAP are recommended to run on SUSE Linux Enterprise 10 64 bits with MaxDB 7.5. SUSE Linux 10 is perform as you need on VMware. The support from Novell and VMware both are committed to the VM which run the SUSE Linux. This had been the important point of why I am choosing SuSE linux over the rest of the operating system available.

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Revise IT strategy on Economy Crisis

Posted on October 16th, 2008 in Data Center, Industry News, Operating Systems | No Comments »

Economy crisis is already happened and impacted to every business around the world. The major impact are really hit to the banking and financial environment. At the same time, I believe that the financial sector are the highest IT spending every year and everywhere around the world to provide service availability to their customer, stock market, and treasury trading.

If we analyze what happen to the IT spending on the financial and banking environment, you will not surprise to see that the amount of storage, servers, solution and unnecessary equipment been under utilized for every bank around the world. The IT department for financial sector had been comfort live for many years and is time now for them to review and revise their IT spending to ensure higher return from their investment.

Open source or reliable LINUX had not been really high utilize in financial sector are really due to the comfort living of their IT department. Personal point of view, why we have to run something else on the expensive IBM AIX, mainframe, HP UX, Microsoft, Oracle VS the reliable LINUX from x86 or x64 platform to perform the same result? The simple answer is really the mindset from the person.
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VM Guest not able to be boot up

Posted on September 26th, 2008 in Operating Systems, Virtualization | No Comments »

Today, something weird happen. 1 of my VM guest which is windows 2003 server suddenly hung up. When I try to reset it, the Console screen show blank after the bios screen. I try to attach the VMDK to another newly created VM and it still not functioning. To verify the vmdk is not corrupted, I mount the vmdk to another windows 2003 VM and I found that the VMDK is functioning.

After that, I try to check most of the setting and log file from putty and virtual center. Here is my finding. Due to some unknown reason, the .vmx file setting and the configuration on the virtual center show really different. I had to force restart the virtual center service, and reconfigure some of the resources setting in virtual center to ensure it had not reserve or limit any resources on CPU and memory, and I power up the VM again. This round, the VM able to power up and functioning. Originally, It shouldn’t reserve any resource as I had not configured that. For some unknown reason, the resources limit had been configured by the ESX itself. This had happened in the pass but it had not cause any issue.

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Tips: Add new disk online

Posted on September 25th, 2008 in Operating Systems, Storage, Tips | 4 Comments »

The following article will share how to add new hard disk into SuSE Linux Enterprise Server without reboot.

Follow these steps:

  • Create a new LUN and assign to the ESX Server Storage Group on SAN.
  • Rescan Storage Adaptors on ESX Server Virtual Infrastructure Console.
  • Add new Hard Disk into VM by Edit Setting.
  • Open VM Console(SSH will work as well).
  • Detect new disk command # rescan-scsi-bus.sh
  • Find new disk command # cat /proc/partitions
  • Create new partition on the disk command # fdisk /dev/sdx
  • Format new disk partition # mkfs.ext3 /dev/sdx1
  • Edit /etc/fstab to add in permanent mount point for new disk and partition.
  • Mount new disk # mount -a

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