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In my initial attempt, I had tried to add host servers to new vCenter without removing them from old vCenter (that machine was shutdown) and a message was shown that this will remove the hosts from previous vCenter. I could click OK or Cancel. I clicked Cancel but is there anything wrong in doing it this way? In other words, not removing hosts from old vCenter till new vCenter is ready to grab them? Thanks.
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In my initial attempt, I had tried to add host servers to new vCenter without removing them from old vCenter (that machine was shutdown) and a message was shown that this will remove the hosts from previous vCenter. I could click OK or Cancel. I clicked Cancel but is there anything wrong in doing it this way? In other words, not removing hosts from old vCenter till new vCenter is ready to grab them? Thanks.

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Not really, just best practice to do it first!
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Not really, just best practice to do it first!

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We have vCenter 5.5 running on rather old physical hardware with SQL 2008 database remotely located.<br />
I have installed a new vCenter 5.5 running on a VM with local SQL 2012 server.<br />
Rather than transferring the old database, I am thinking of creating a new database.<br />
I know that I will lose the performance data, and will not have HA and DRS for 15-30 minutes while old server is down and new is not fully configured. (I have no Distributed vSwitches.)<br />
<br />
Is there any other downside?<br />
What precautions do I need to take? Thanks.
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We have vCenter 5.5 running on rather old physical hardware with SQL 2008 database remotely located.
I have installed a new vCenter 5.5 running on a VM with local SQL 2012 server.
Rather than transferring the old database, I am thinking of creating a new database.
I know that I will lose the performance data, and will not have HA and DRS for 15-30 minutes while old server is down and new is not fully configured. (I have no Distributed vSwitches.)

Is there any other downside?
What precautions do I need to take? Thanks.

Redoing VMware vCenter server wiith new database

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.