The bulk of your question has already been answered but this one remains:
> What will MS gain from it?
I think this is an interesting question. It has been a minute since I worked in this field so my info may be out of date.
My understanding is the LSE runs on MelliniumIT's trading Engine and this is UNIX based?
One would think MS is looking for a way to market its cloud. "LSE runs on Azure and you should too" but in the case of the most valuable component (the matching engine) - I believe it runs on something like RedHat?
So perhaps MSs spin will be "we love Redhat as well and LSE runs on our RHEL servers?"
Microsoft's gain here is that they hurt their competitors, and they have demonstrated that they are willing to spend virtually unlimited sums of money to do that in certain cases.
When MS bought HoTMaiL, it was running on Unix. So, MS forced them to switch to Windows. And the service failed. So MS doubled the number of computers to throw at the problem, and forced them again. And failed again. And MS doubled the number of computers to through at the problem again, and finally HoTMaiL was now a turd but it wasn't completely totally dead.
Which meant that MS won and Unix lost. It didn't matter how much it cost or who they hurt in the process, they made that dog talk.
> What will MS gain from it?
I think this is an interesting question. It has been a minute since I worked in this field so my info may be out of date.
My understanding is the LSE runs on MelliniumIT's trading Engine and this is UNIX based?
One would think MS is looking for a way to market its cloud. "LSE runs on Azure and you should too" but in the case of the most valuable component (the matching engine) - I believe it runs on something like RedHat?
So perhaps MSs spin will be "we love Redhat as well and LSE runs on our RHEL servers?"