Last week, we announced the InterSystems IRIS Data Platform, our new and comprehensive platform for all your data endeavours, whether transactional, analytics or both. We've included many of the features our customers know and loved from Caché and Ensemble, but in this article we'll shed a little more light on one of the new capabilities of the platform: SQL Sharding, a powerful new feature in our scalability story.

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· Jan 19, 2018 3m read
DigitalOcean API implementation

Recently DigitalOcean introduced new plans for droplets, but as existing droplets stayed on the old plans I decided to use API to resize them automatically. After reading tutorial, I wrote partial client for DigitalOcean API, which I would like to share today.

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Last week saw the launch of the InterSystems IRIS Data Platform in sunny California.

For the engaging eXPerience Labs (XP-Labs) training sessions, my first customer and favourite department (Learning Services), was working hard assisting and supporting us all behind the scene.

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Where did the RemoteSystemsTempFiles project come from?

If you're using Atelier, you may have noticed a project called "RemoteSystemsTempFiles" in the Atelier Explorer and Project Explorer views. This project is automatically created by the Eclipse Remote Systems Explorer (RSE) on start-up. The RSE allows you to connect to and work with a variety of remote systems.

You can either hide this project within your views, or remove it completely by following the steps below.

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Hi, Community!

Someday you find yourself having a wonderful class package which can be helpful in several projects. So it is a library package.

How to make the classes available for different namespaces in Caché? There are two ways (at least two ways familiar to me):

1. Start the name of the package with %, like %FantasticLib.SuperClass. Wrong way.

If you do that the class would be placed in %SYS and would be available in other namespaces.

This is wrong because of the two reasons:

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· Jan 4, 2018 5m read
Caché audit & DeepSee

Apart from the database server itself, the standard bundle of the Caché DBMS includes DeepSee, a real-time business intelligence tool. DeepSee is the quickest and the simplest way of adding OLAP functionality to your Caché application.

Another standard component is an Audit subsystem with a web interface, which has the options for expanding with your own event types and an API for using in an application code.

Below is a small example of the joint use of these subsystems that answers the following questions: who did what and when in an information system?

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With the release of Cache 2016.1, JSON support was re-architected and made part of the core object model with the creation of %Object and %Array classes, which allow you to create dynamic JSON enabled objects and arrays.

On a recent demonstration I was working on, I had the need to create a REST web service that returned a JSON representation of a persistent object. After searching for methods that would allow me to accomplish this, ultimately I found none, until now.

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· Dec 7, 2017 3m read
Asynchronous REST

In this article I'd like to discuss asynchronous REST and approaches to implementing it.

Why do we need asynchronous REST? Simply put - answering the request takes too much time. While most requests usually can be satisfied immediately, some can't. The reasons are varied:

  • You need to perform time-consuming calculations
  • Performing action actually takes time (for example container creation)
  • etc.

The solution to these problems is asynchronous REST. Asynchronous REST works by separating request and real response. Here's an example, let's consider the following simple async REST broker:

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· Dec 9, 2017 1m read
Simple Game Code(21 sticks Game)
    w "Total No.Of Sticks:21"_!
    s sticks=21
    r "enter machine name: ",a
    r "enter dev name: ",b
    w "Display 1 to 21 sticks"_!
    s i=""
    f i=1:1:21{
        w " "_i_" "
    w !_"User select 1 or 2 or 3 or 4 sticks:"_!
    r "User enter sticks: ",us
    if us>4 {
        w "please select upto 4 Sticks"
        r "User enter sticks: ",us
    s cnt=sticks-us
    s sticks=cnt
    f i=1:1:sticks {
        w " "_i_" "
    s dev=1
    s machine=0
    d:sticks=0 lost(dev,machine)
    d machine(.sticks,us)
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First-class functionwiki

In computer science, a programming language is said to have first-class functions if it treats functions as first-class citizens. This means the language supports passing functions as arguments to other functions, returning them as the values from other functions, and assigning them to variables or storing them in data structures. Some programming language theorists require support for anonymous functions (function literals) as well. In languages with first-class functions, the names of functions do not have any special status; they are treated like ordinary variables with a function type.

This post continues the article “Declarative development in Caché”.

[2, 3, 5, 7, 11, 13, 17].forEach(function(i) {

How to do something like this in Caché using COS?

Below are some exercises on this topic.

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· Nov 27, 2017 1m read
Upgrading TLS configurations

Caché will not change the cryptographic settings in an existing TLS configuration when you upgrade. This means that unless you've updated them yourself, you're still using the values from the very first version you started using SSL in.

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This is a series of programming challenges for beginners and experienced Caché programmers.

For an introduction : go to article

The challenge of day 21 is about scrambling passwords.

There are a few functions you need to implement that will do operations on a string :

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This is a series of programming challenges for beginners and experienced Caché programmers.

For an introduction : go to article

Today's challenge is a variation on the White Elephant gift exchange (, in this case, by a bunch of Elves where only one can have all gifts.

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