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#Databases

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InterSystems Caché database is a file where all the data, application scripts, and users, roles and security configurations are stored. Typically the name of the file is cache.dat.

Documentation.

Hi Developers!

Here're the technology bonuses for the InterSystems IRIS Datasets Contest 2021 that will give you extra points in the voting:

  • Dataset Usage Demo Repository - 4
  • LOAD DATA Usage - 3
  • Questionnaire - 2
  • Unique Real Dataset - 4
  • Docker container usage - 2
  • ZPM Package deployment - 3
  • Online Demo - 2
  • Code Quality pass - 1
  • First Article on Developer Community - 2
  • Second Article On DC - 1
  • Video on YouTube - 3

See the details below.<--break->

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Article
· Dec 20, 2021 1m read
Holiday Reading: What Lies Beneath!

For those of you who might be new to IRIS, and even those who have used Cache or IRIS for some time but want to explore beyond its usually-assumed boundaries and practices, you might want to dive into this detailed exploration of the database engine that is at its heart, and discover just what you can really do with it, going way beyond what InterSystems have done with it for you.

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Hi Community,

We are pleased to invite all the developers to the upcoming InterSystems Datasets Contest Kick-off Webinar! The topic of this webinar is dedicated to the Datasets contest.

In this webinar, we’ll do a quick tour of the new LOAD DATA feature, also chime in on packaging global data or file data with ZPM, and run a data-generation script as part of a method in the zpm install.

As always, our experts will answer the questions on how to develop, build, and deploy datasets using InterSystems IRIS.

Date & Time: Tuesday, December 28 – 10:00 AM EDT

Speakers:
🗣 @Benjamin De Boe, Product Manager, InterSystems
🗣 @Evgeny Shvarov, InterSystems Developer Ecosystem Manager

https://www.youtube.com/embed/jm7bDK0FoiI
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Discussion
· Dec 28, 2021
On Datasets Licensing

Hi developers!

We launched the datasets contest.

And one of the important questions that need to be covered is dataset licensing.

There are two general cases:

a) a dataset you take from another place in public Internet or private network/person.

b) a dataset you create by yourself or own for any other reason.

We decided to follow the principles and considerations that data.world site introduces for datasets' licensing.

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Hi Community,

New video is already on InterSystems Developers YouTube:

⏯ Updates on Security: OpenSSL and a New "Security" Database

https://www.youtube.com/embed/Eb5kPw8-l08
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I've been accessing Cache tables from a developer/reporting side, but am now involved in a project to create a data warehouse for our application. I'm trying to find a query I can use to return the sizes of all the tables in the database, so we can identify the largest tables and handle those individually. Can someone give me a query I can run against our Cache database to return the sizes of all the tables from largest to smallest?

Thanks for the help

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I am relatively new to Intersystems cache database management. As I understand it, a database is set with a maximum size or unlimited and the size of each space allocation for the database is defined. My understanding is that the cache database will then manage the allotment of space to the database as the current space allocation is consumed. Though I do not know why one would want to do this, I have been told that the space allocation to a database can be set to be handled manually. This is something, if true, I was not aware of.

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I have a workstation with a CACHE instance up and running.

On that same workstation there is also an instance of IRIS (fresh install). I would like to migrate manually the CACHE database to IRIS (ideally, all globals, routines and classes).

What I tried is to copy C:\InterSystems\Cache\mgr\CACHE.DAT to C:\InterSystems\IRIS\mgr\IRIS.DAT (after shutting down both instances) but it does not work.

I got the following message : (112) The service for the IRIS instance did not start.

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Hi Community,

Join the upcoming InterSystems Interoperability Contest Kick-off Webinar dedicated to the Interoperability Contest.

In this webinar, you'll get an overview of the interoperability capabilities of InterSystems IRIS, and we'll show you how to use the PEX. Also, we’ll discuss and answer your questions on how to build interoperability solutions using InterSystems IRIS and IRIS for Health.

Date & Time: Monday, October 4 — 12:00 AM EDT

Speakers:
🗣 @Stefan Wittmann, InterSystems Product Manager
🗣 @Bob Kuszewski, InterSystems Product Manager
🗣 @Evgeny Shvarov, InterSystems Developer Ecosystem Manager

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I would like to know if an encrypted caché database can run significantly slower than a normal "unencrypted" database, in a way that is noticeable to the end user (e.g. slower response time for most pages, especially the ones that rely on read/writing to globals).

I searched in Intersystems knowledge base and couldn't find anything related. I'm looking for possible before/after benchmarks.

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How to find a global's original namespace ? Potentially mapped from a different namespace .

I have a global ^Custom that exists in multiple namespaces but it could mapped from namespace Drone(A) to Launch(B)

Without access to Cache management portal how to find where is my global located using cache code ?

Like if ^Custom == ^[Drone]Custom ??

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Hello gentlemen,

I hope you can help me because this is a very serious that I can't wait to resolve... Our back-up is currently taking 3 up to 4 Gb per day and we don't know why. We had 270 Gb yesterday and we are today at 274.3 Gb. We keep a computer history of the messages for only 50 days. Here is a picture of what's currently taking the most data place in our healtshare system:

(don't forget that our DB is also connected to the back-up, maybe it is related, I don't know)

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In a typical database, changing the type of a column from some kind of date/time to a string would require a degree of migration effort for existing values. In Caché, my suspicion is that this is not the case, and I could simply change a property definition from %Timestamp to %String (MAXLEN = "30") and recompile, without needing to worry about damaging the existing data stored for this property. Is this correct? Or would I find the existing data in this property being lost or corrupted?

Thanks in anticipation

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