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InterSystems IRIS is built on an architecture that separates the logical organization of data (namespaces) from its physical storage location (databases). Understanding this separation and the distinction between Namespaces and Databases is crucial for effective data management, security, and especially, high-performance data sharing.

In this article, I will discuss these foundational components and provide a practical guide on leveraging global mappings to share native data structures (globals) across different logical environments.

Databases: Physical Reality

A database represents the physical reality of where the data is stored on the disk. First and foremost, it’s a file in a file system called IRIS.dat (e.g., <Install folder>\mgr\user\IRIS.DAT). The maximum size of this file is 32TB. It is the container for all the actual data and the code. Databases are managed by the IRIS kernel, which handles caching, journaling, and transaction logging at the physical file level.

When you install InterSystems IRIS DBMS, the following databases are installed automatically:

Overview

Version 25.23.2 delivers targeted improvements to the Advanced Security UI and further streamlines the upgrade and update workflows across InterSystems Cloud offerings. These changes focus on clarity, efficiency, and operational excellence.

New Features and Enhancements

Hey Community!

We're happy to share a new video from our InterSystems Developers YouTube:

⏯ Using InterSystems Data Studio with Supply Chain Module as a Data Gateway @ Ready 2025

https://www.youtube.com/embed/Fsj90EItuBI
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Developing with InterSystems Objects and SQL – In Person June 9-13, 2025

I frequently use the #call (https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY...) feature to make asynchronous calls in the CSP. However, in some cases, I encounter a timeout issue with the CSP Gateway. Is there any way to change this call timeout? I don't want to change the default configuration in the CSP Gateway.

Managing InterSystems Servers – Virtual January 5-9, 2026

I’m using recursive CTEs for hierarchical data, but the planner seems to produce inefficient plans. Can I influence or extend the query optimizer behavior in IRIS?

Hi, Community!

See how to efficiently validate incoming CDA documents and comply with standards using the cloud-based CDA Validation Service!

Streamlining CDA Data Feed Setup in Health Connect Cloud

https://www.youtube.com/embed/Sd6BpXyWezs?utm_source=youtube&utm_medium=social&utm_campaign=Sd6BpXyWezs
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Hello and welcome to the Developer Ecosystem News!

The fourth quarter of the year was full of exciting activities in the InterSystems Developer Ecosystem. In case you missed something, we've prepared a selection of the hottest news and topics for you to catch up on!

Hey Developers,

Enjoy the new video on InterSystems Developers YouTube

⏯ HealthShare Vision & Roadmap - Fueling Faster AI Adoption Through Trusted Health Data @ READY 2025

https://www.youtube.com/embed/UdnpN7m-kRs
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Instead of default storage classes, I want to implement my own SQL storage mapping for a persistent class (e.g., denormalized or sparse matrix structures). How do I define and manage custom storage definitions?