Multiple Spaces migration between two different Confluence instances.

[sanan sanan]

Hi,

There are around 80+ spaces in Confluence A. 

I have to migrate all those spaces to Confluence B. 

Both the Confluences are on server.

Is there any better way other than exporting all the individual spaces into xml and importing all of them one by one on the target instance? as this will take a long time for us.

as far as I now taking full export and restoring it will overwrite everything at target Confluence.

Versions and other configuration are matched already so no problem at that part.

Regards

sanan