Gartner Blog Network

Henry Cook
Research Director
4 years at Gartner
40+ years IT Industry, 30+ in data warehousing

Henry Cook is a Research Director in Gartner for IT Leaders with particular specialization in database, data warehousing, big data, in-memory database and analytics topics. Read Full Bio

SQL the Eternal Golden Data Language*

by Henry Cook  |  March 27, 2018

Recently I got involved in a conversation about why SQL remains so popular. My friend and colleague Svetlana suggested I blog on the topic as it might be useful to others as a way of thinking about this. She noted that Chamberlin and Boyce were working in the same IBM office. They “talked to each other in SQL”, to […]

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Looking at the LDW Through RoI Tinted Glasses

by Henry Cook  |  February 22, 2018

I remarked in a previous blog that there are certain themes that regularly pop up in my client conversations, because they are useful tools in thinking about analytics and the Logical Data Warehouse (LDW) in particular. Here’s another favorite: In many situations when trying to understand how to move forward, a Return on Investment (RoI) point of view makes things […]

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Logical Data Warehouse (LDW) Design and Barcelona

by Henry Cook  |  February 9, 2018

In my last blog, I mentioned some books I’d recently rediscovered. This reminded me of two more books that many IT architects would find interesting – and that in turn reminded me of a concept that comes up repeatedly in my calls and is worth passing on as it can be a big help. The concept […]

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The Logical Data Warehouse and its Jobs to be Done

by Henry Cook  |  January 28, 2018

Over the holidays I reread parts of the fabulous books on innovation and disruptive change by Clayton Christensen. If you have not read  The Innovators Dilemma, The Innovators Solution or Competing Against Luck then I can highly recommend them. Systems architects will be interested in his discussion on monolithic and modular architectures, and their relationship to the dynamics of […]

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Logical Data Warehouse Project Planning

by Henry Cook  |  January 18, 2018

As this new year started I was reminded of a suggestion by my friend and colleague Erik to blog a diagram I was using that illustrates the size and shape of Logical Data Warehouse (LDW) projects. He’d remarked that it was likely that many people would likely find it useful. The LDW is a multi-server / multi-engine […]

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Simple Sizing for Big Data Stores from Business Metrics

by Henry Cook  |  May 30, 2017

When developing analytic system system sizing is one of things that it is beneficial to do ‘early and often’. However, getting a reasonable estimate early on in a project can seem difficult. However there is a simple trick that can be used for most analytical big data systems – data warehouses, data marts and data lakes.

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Logical Data Warehouse (LDW) – Three Parallel Development Styles

by Henry Cook  |  May 23, 2017

I’ve recently had the opportunity to write about the Logical Data Warehouse(LDW). In the paper I describe three parallel streams rather than a single development path. The development is cyclic. Like the classic data warehouse before it, the logical data warehouse is never finished. That is because it provides a digital representation of pretty much […]

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