Synchronize access to stream data section by section

I am a consultant, trainer, software archtect/engineer, since the early 1980s, working in the greater area of Boston, MA, USA.
 
My work comprises the entire spectrum of software, shrink-wrapped applications, IT client-server, systems and protocol related work, compilers and operating systems, and more ....
 
I am currently focused on platform development for distributed computing in service oriented data centers.