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I had not fully understood parent child datacenter relationship. So clients for preference update child nodes and then all nodes vote, but if all siblings agree then all parents will too (assuming no clients connected up tree). Then everything else is replication.

Seems topology plays a fairly big role, larger than I expected. Thank you. I am sorry if it seems like I was trying to steal your inner most secrets, but I find that unless I know enough to (think) I can rebuild it I really have not understood.

What I think is exciting now is that there is a rush of new distributed solutions from many different directions - the RDBMS has held sway since the late 70s and now hierarchical and network designs are coming back I to vogue - and almost anyone can play (not that you are just anyone, but you don't need to be oracle or sybase)

part of me is missing the old certainties of rdbmses and part of me is excited - I have to know the tech and choose the best option for the domain

one final question - more business orientated. You grew a solution to meet specific business needs - how long from the first idea till live client connect was it - and was there business support for the time it would take (ie were you constantly fighting for time or were you given space and time?)

hard to answer I suspect but interested anyway

cheers



The system has been in development since 2007, with many iterations to arrive at the current architecture, so it'd be hard to give a particular date.


Thank you for kindly letting me / us all into your system.

Good luck




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