I am having an issue with Magento Data Upgradation. I need your suggestions for best possible way to achieve the following
How can I upgrade Magento with older version to newer version with LIVE data ?
How I can I upload my changes on LIVE Server with ZERO Downtime ?
Please do not downvote or mark this as duplicate, because I have searched many forums and could not get the best feasible solution/way to achieve the above functionality.