Retailers would love to have a system where there is very very very less and limited stoppage of application during the upgrade process. Moreover, retailers would never want a scenario where the billing application is stopped during heavily peak transaction time and all they would love to do is just billing!
It is very important that the billing should not stop at any point of time and moreover the application should not be stopped for more than few minutes to avoid chaos and confusion in the checkout-counter.
BPartner Solution is happy to claim that at point of time during the upgrades, the application server will be made available with in 2 minutes from start to end.
Recently, Relax POS was upgraded in a heavily crowded super market which was having more than 15 clients and 1 server. We took this exercise to benchmark our Hot-Upgrade procedure and here is the result.