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Customers who switch to Caché from relational databases report that their average performance is up to 20 time faster, running on the same hardware, with no changes to the application. What is it about Caché that lets applications run so fast?

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Article
· May 12, 2025 7m read
An Overview of Database Degrade

Introduction

Hello! In this article, I will be discussing database degrade, a type of data integrity issue one can face when using IRIS. First, I will be going over a review of the structure of IRIS databases. I'll then discuss how database degrade can manifest and common causes of degrade issues. I'll then conclude with general tips we give our customers about how to prevent or prepare for database degrade issues.

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Hello, I want to create PDF from HTML source. I found pandoc. I installed pandoc on IRIS container image. I created Interoperability production. I have setup REST service to receive HTML file in request body. I call pandoc command pandoc -o output.pdf input.html from a BPL process. I copy output.pdf file stream into response body. I save the response at the source. I get a file named output.pdf but it does not load in Acrobat. I suspect I am doing something wrong with headers (accept-encoding?) or maybe do I need to base64 encode the pdf file to transfer it via REST?

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s ftp=##class(%Net.FtpSession).%New()

s ok=ftp.Connect(server,user,password,port)
s ftp.Timeout = 100

i ok {

s ok=ftp.SetDirectory(directory)
i ok {
n files,file

s ok=ftp.NameList(directory,.files)
i ok {
f i=1:1:files.Count() {
s file=files.GetAt(i)
i (ftp.SetDirectory(file)) {
d ftp.SetToParentDirectory()
continue
}
s fname=$p(file,"/",$l(file,"/"))

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I am trying to get data out of a cache backup. I am completely new to Intersystems Cache.

I got a docker image of Cache from this post:

I want to get the data from my backup into this docker image. First, I need access to a gui and a cli, then I need some instructions or documentation for actually pulling in the backup data.

Thanks! This is all new, so pardon my lack of knowledge here. If I can provide any more information let me know.

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InterSystems announces its first developer preview, as part of the developer preview program for 2023.1 release. Many updates and enhancements have been added in 2023.1 and there are also brand-new capabilities, such as production-ready support for Columnar Storage, ability to use Bulk FHIR, and support to MacOS 13 Ventura. Some of these features or improvements may not be available in this current developer preview.

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We have a scenario where an ObjectScript-based production calls a lookup service (SOAP in C#) to get information used in a value-set mapping process. The results can be cached in an IRISTEMP global to prevent a network call for every value, but that can hang around for quite some time on production systems.

The next logical step would seem to be to encapsulate strategies (LRU, MRU, etc.) and eviction code into an ObjectScript class that can be reused (we are not in a position yet to leverage embedded Python).

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Hey guys,

I have a problem when creating a remote database (via ECP), when I select the remote directory field it presents the error below:
"There was an error on the server:
ERROR # 179: An unexpected error has occurred:
<DIRECTORY>zRemoteDatabaseListExecute+52^SYS.Database.1.*:ds:IRISTEMP
ORIGIN ELEMENT:% CSP.UI.Component.remoteDatabaseSelect (DirectororySelect)"

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Question
· May 14, 2021
Luhn Mod N in Cache?

Hi all

I'm trying to recreate this method below in Cache/IRIS.

https://en.wikipedia.org/wiki/Luhn_mod_N_algorithm ISO-7812-1 (LUHN-10)

I've been following the javascript example. It seems simple in theory but i'm struggling with which cache methods to pick.

$LENGTH, $System.SQL.FLOOR() - seem ok

$EXTRACT - I think for .charAt (though may need to correct base)

$FIND - for .indexOf

Any suggestion which would be the best ones for the job?

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We are seeing more and more customers being lured with latest infrastructure technologies, particularly Composable Infrastructure. Coming with all sorts of data center consolidations and costs savings.

Question is: are there any concerns for HealthShare/TrakCare being run on these platforms or things to look out for? Anyone out there, already on these platforms?

To be more specific this is HPe Synergy with 480 Compute blades booting as bare metal.

Regards;

Anzelem.

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I'm trying to tie IRIS (2019.1) into our Concord Fax cloud-based email-to-fax workflow. We have some sites that require a fax be sent to multiple locations based upon certain data (ie Radiology and Emergency departments). Unfortunately, CC-ing does not work with Concord Fax so I need a way to send the email, change the recipient, and then send it again if certain criteria are met. Is this possible? Do I need to duplicate and rename the method, calling the second one in the MessageMap?

Here's what my code currently looks like:

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Hi Community

I've just started developing for a new client and noticed that the View Raw Contents link isn't displayed when inspecting HL7 message contents in the Management Portal. Is the link missing due to:

1) a configuration setting?

2) a security setting?

3) a difference between installation on Unix Vs Windows?

And is there a way to turn it on?

I've trawled through the doco but haven't been able to find anything on this.

Thanks in advance for any help you can give

Duncan

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I have created a custom Business Process setting called X509CredentialAlias in which I load the name of the credential alias to use for some background processes. I have looked through EnsPortal.Component but do not see an option for selecting X509 certs stored within IRIS. How might I adjust this setting to query all X509 certs saved within IRIS and offer a drop-down selection to the user within the business process? Similar to the EnsPortal.Component.sslConfigSelector.

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InterSystems FAQ rubric

You can use the %IndexBuilder class to perform index rebuilding using multiple processes.

Here is an example for the purpose of defining the standard index HomeStateIdx for the Home_State (state information of contact address) column of Sample.Person.

The steps are as follows:

1. Hide the index name to be added/rebuilt from the query optimizer.

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