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For anyone wanting to learn more about globals as a database storage technology, and some information on how to use them to model various kinds of database structures, I've created this repository of documents just for you!  Hopefully it will provide some inspiration towards this competition. 

https://github.com/robtweed/global_storage

Glad you liked the articles, Ken.  How IRIS (and Cache) handles the physical side of global storage is, of course, proprietary, but, as the article referred to by Alexander explains, it's done using a fairly classic b-tree architecture.  For performance, access to the physical database is buffered via memory, the amount of which you can configure. Additionally, IRIS and Cache both have ECP networking which adds an amazing level of additional power and flexibility with Globals able to be transparently abstracted across networked machines - needless to say the technicalities of ECP are a closely-guarded proprietary secret!

As my articles explain, however, you can actually implement the basics of global storage on top of a number of other different databases, with BerkeleyDB being probably the closest example to how IRIS and Cache implement them.

Of course, for the average user, how the concept/abstraction of Global Storage is physically implemented is of less interest than how you can harness and make use of Global Storage to do the kinds of things you want to do.  That, of course, was the focus of my articles, to show just some of the most common ways (and some of the lesser-known and very sophisticated ways) in which you can harness Global Storage.

I've sometimes described Global Storage as a "proto-database" - a very simple but powerful and flexible database engine on which you can model pretty much anything else and on which you can layer all the other stuff you need to create your specific database environment.  As such, it's unique in the database marketplace, and it has always baffled me over the years why it's so little known about and used: it blows away everything else out there.

Anyway, a Happy New Year to all fans of IRIS and Global Storage!

Rob

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