Migrate from vcenter 4.0 to 4.1

Hello Experts,

I want to migrate from vcenter 4.0 to 4.1. In my existing infrastructure, I have vcenter and the database servers running on 32-bit platform. I am looking for the migration path and its requirements.

Many Thanks,
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Insert the 4.1 vCenter CDROM, in the Server, and run the setup.

It will detect the existing 4.0 installation, and upgrade it, the vCenter Service and Database.

Make sure you have a full backup of the server before you start.
muzzammilhussainAuthor Commented:
vcenter 4.1 requires 64-bit OS so thats why I am looking for migration path
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Whoops, sorry my mistake.

Do you need to complete a migration, rather than install a new fresh server ?

see here

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muzzammilhussainAuthor Commented:
Thanks Andrew. please send me the link for migrating the vcenter setting and database from 4.0 to 4.1 after the new install.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
do you need to Migrate or create a New vCenter 4.1 installation?

A brand new vCenter 4,.1 installation is easier, and requires no migration, the only different is you will start with a fresh database, so you will have no performance summary information.

Is this going to cause you an issue?

So, do you need to perform a migration or new 4.1 vCenter Install ?

see here


muzzammilhussainAuthor Commented:
Thanks for your help Andrew. Sorry if I am asking silly questions but I am new to VMWare.

I can definitely leave the performance data but what will happen to my datacenter/cluster/vm and templates/ and network settings. How would these things appear on vcenter 4.1.
muzzammilhussainAuthor Commented:
Also, the settings for the update manager.
muzzammilhussainAuthor Commented:
I have the database server that is running windows 2003 enterprise 32-bit and SQL Server 2005 for my existing vcenter 4.0 server. This has got the database for vcenter and the update manager

Can I use my existing SQL server and connect the new vcenter 4.1 to the existing databases so that my new vcenter can look same as the old one without re-configuring anything? Please let me know if this is possible.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, you can.

The easiest method would be to create a new 64 bit server. Create the DSNs to the old database, and then Install vCenter 4.1, and select your old database.

64 bit DSN for vCenter DB
32 bit DSN for VMware Update Manager DB

It will detect and update the database.
muzzammilhussainAuthor Commented:
OK Thanks.

please confirm if "64 bit DSN for vCenter DB" will work regardless of the SQL server 2005 being installed on 32-bit OS?

If it does, my plan will be:

take backup of existing vcenter and database servers
Switch off vcenter 4.0 server
create DSNs and install vcenter 4.1 and update manager on 64-bit platform using the name and IPs of the old server
After the install my vcenter client will appear same as the old one

If anything fails then use backups to recover the old vcenter and the database.

Please let me know if I have missed any point here.

 Again thanks very much for you time and help. Much appreciated.
muzzammilhussainAuthor Commented:
the setup is very complicated so my target is to avoid re-configuring things on the new vcenter.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, this is the correct procedure.

please confirm if "64 bit DSN for vCenter DB" will work regardless of the SQL server 2005 being installed on 32-bit OS?

Yes, I checked the VMware Matrix here


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muzzammilhussainAuthor Commented:
Many Thanks
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