Blog Archives

OracleVM & Oracle licensing….

Be aware of licensing, ‘soft’ partitioned virtualized guests with Oracle products installed are a financial RISK!

OracleVM supports ‘Hard’ partitioning.

In essence the OracleVM product is equal to any ‘soft’ partitioning solution. This is because in essence the Oracle (Xen) Hypervisor will also use all of the resources in the pool to spread the workload as efficiently as possible (para virtualized). In this scenario the licensing model will also require you to license all the available CPUs on the fysical box.

There is a supported method to circumvent this. If you configure the domain to map its virtual CPUs to Fysical CPUs, this setup is accepted by Oracle as ‘Hard’ partitioning. A special configuration entry needs to be set to the vm.cfg of each virtual machine running an Oracle Database as described in this Oracle Document.

Remember to set this configuration rule!
Else Oracle Licensing will identify your cool OracleVM infrastructure as just another Soft partitioned VM solution that requires you to license each fysical CPU available to the virtual platform 😉

Additional reading :



Simple VBScript to restart all VMware services

strComputer = “.”
Set objWMIService = GetObject(“winmgmts:{impersonationLevel=impersonate}!\\”&strComputer&”\root\cimv2”)
Set colListOfServices = objWMIService.ExecQuery(“Select * from win32_Service where Name Like ‘VM%'”)
IntSleep = 15000
For Each objService in colListOfServices
If UCase(Left(, 1)) > “N” then
WScript.Sleep intSleep
strMsg = strMsg & vbCr & & ” Restarted.”
End If

Wscript.Echo strMsg

Sure you can tweak and modify it as you see fit 🙂

Tip : Free Nero alternative.

Recently I can accros a problem where uploading files to a VM machine using SCP (SSH) just wasnt possible… 😦

It was also the moment I found that I forgot to bring my ISO container containing the file, that would enable me to mount that image within VMware. Thank god i found that Nero GNU alternative that does what nero does. Build ISO files. You can find the download here 🙂

If you like the tool? Dont be shy and donate 😉

Timekeeping in VMware… o my…

If there is a subject that has many and i realy mean many posts, and with these posts many many readers its timekeeping in vmware. Especially when your Guest OS is of the linux platform. Also there are many suggestions on how to solve this problem. Too give you guys a quick glace of whats happening out there… Some of the suggestions you might encounter.

1. Cron the ntpd refresh command. (put the ntp renew in a task and execute it every second)
    (Not realy an option with 100Servers+ and loads, loads of network traffic)
2. Recompile the kernel using the 100Hz frequency setting instead of the 1000 or 250hz setting.
    (One I want to test before discarding it, he might have a point there)
3. Patch the kernel / NTPD using the latest versions.
     (Should be a standard job and best practice, not an suggestion!)
4. Use a VMWare compatible compiled rpm to reinstall the kernel.
     (Sounds much like option 2 i want to test first, ill go for the manual compile 🙂 )
5. dont even want to mention all these other options 
     (too silly but fun reading 🙂 )

With all respect to the guys searching and finding solutions stated above. There was indeed a time these solutions where the best to apply. But time has gone past, vmware introduced solutions using the VMWare tools (almost the same a the cron solution). And communities responded comitted to solve these problems for their most valued distro. The result is a setting in the kernel that is available for various kernels, and these settings can be found on the VMware site. Even though i commited myself to test these various options before implementing one or the other, the bootloader option looks the savest to suggest too the big audience. So here it is.

Oh always there are people to thank 🙂
• My uncle for paying way more attention then me 🙂 Marco Gralike
• Prutser for breaking open the kernel discussion, good article there.
•  VMware for maintaining there KB so well 🙂
• You for taking the time to read this nonsense 🙂