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Question
· Nov 26, 2020
10000 clients simultaneously

How InterSystems solutions handle C10k connections? ( https://en.wikipedia.org/wiki/C10k_problem )
For example, I want to create a social network on InterSystems platform.
In the scenario client (browser) => CSP Gateway => Cache can the Cache handle a large number of clients at the same time?
Quick analysis shows that CSP Gateway for each request opens a new TCP connection to Cache SuperServer (port 1972) allocating CSP session and license slot.

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This code snippet sends an XML request to a server and saves the response to a file. The class method "test" runs the code:


Class objectscript.postXML
{
    classmethod test() {
        Set HTTPRequest = ##class(%Net.HttpRequest).%New()
        Set HTTPRequest.ContentType = "text/xml"
        Set HTTPRequest.NoDefaultContentCharset = 1
        Set HTTPRequest.Location = "ITOMCZ"
        Set HTTPRequest.Server = "wph.foactive.com"
        Do HTTPRequest.RemoveHeader("User-Agent")  
        Do HTTPRequest.RemoveHeader("Accept-Encoding") 
        Do HTTPRequest.RemoveHeader("Connection")
        Do HTTPRequest.SetHeader("Expect","100-continue")
     
        Set RequestXML = ##class(%Library.File).%New("c:\test.xml")
        Do RequestXML.Open("RS")
        Do HTTPRequest.EntityBody.CopyFrom(RequestXML)
        Do RequestXML.%Close()
     
        Do HTTPRequest.Post(HTTPRequest.Location)
     
        Do $System.OBJ.Dump(HTTPRequest)
        Do $System.OBJ.Dump(HTTPRequest.HttpResponse)
     
        Write HTTPRequest.HttpResponse.Data.Size
        Write HTTPRequest.ContentLength
     
        Set ResponseStream = ##class(%Stream.FileBinary).%New()
        // Second part is typically the file extension, i.e.: application/pdf -> pdf
        Set FileType = $Piece(HTTPRequest.HttpResponse.GetHeader("CONTENT-TYPE"),"/",2)
        Set ResponseStream.Filename = "C:\test."_FileType
     
        Write ResponseStream.CopyFrom(HTTPRequest.HttpResponse.Data)
     
        Write ResponseStream.%Save()
        Do ResponseStream.%Close()
    }
}

Here's a link to the code on GitHub

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Article
· Feb 19, 2016 1m read
Simple WorkMgr example

Attached code contains a very basic $system.WorkMgr example.

It uses several jobs (workers) to update different chunks of rows of a table.

Steps:

  • Creates a table with 100 records.
  • Split table in chunks
  • Initialize WorkMgr and queue chunks to workers.
    • Every worker simply sets its process number in the Job field of the processed row.

In this case, I have tested the example in a 8-core laptop:

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Hi.. I have an issue where we are using OAuth2.0 with the ZAUTHENTICATE routine. Once our token is validated we are using a users lan id (passed on the ID token) to find a software defined username in a Cache Global.

That is all working fine in ZAUTHENTICATE.. I am setting the software defined username in the Properties("Comment") array and wanting to reference it in the Rest Service Dispatch class.

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When refreshing a html or tablePane component using refreshContents() that takes a lot of server-side-processing, I'm running into timeouts every now and then. i.e., the result for the tablePane is that there's nothing displayed at all.

How can we configure (relax) that timeout so also those heavier ones get refreshed eventually? Just overriding %request.Timeout in %OnPreHTTP did not seem to do the trick.

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Hi Team,

A month ago, we purchased the cache license for a 10user limitation. We are a 6developers and using 3different development (internal)servers for this same license. All Developers aren't login at the same time. We have a limitation for login 2developers at a time in a server. But sometimes, we are facing a <LICENSE LIMIT EXCEEDED> issue. We don't know why we are facing this one. So anyone please guide me, why we are getting this type of issue. I have attached the errored screenshot.

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I have a CACHE.DAT file that is working under CACHE version 2015.1.0.429.0

I have a second machine with CACHE version 2017.2.0.741.0

When I attempt to add/use the CACHE.DAT in the new version of CACHE, it will not mount.

How do I upgrade/convert the DAT file to make it work under the new CACHE version?

Thx. Larry...

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we are receiving the MDM document from one Data Source , we need to convert the MDM to ORU to send to the receiving Data Source.
Does HS components could make this conversion or we need to use Ensemble mapping to convert the MDM to ORU message?

Thanks,

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hi,

1. Created a class(test) and added a classmethod(checkdata).

2. Assigned a object with xml.

3. Created a new class for response and initialized in classmethod(checkdata).

4. Created a new class for request parsing with list of object parameter.

5. While parsing xml in request for list of object, the result count is "0". But the xml has value for "2" object list.

6. XML has follow:

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Hello!

I am taking the 'Creating an InterSystems Class Definition' course, and the Exercices asks to open a Terminal from the Management Portal to create and interact with a new object. I didn't found how to acces tot the Terminal from the Management Portal, and the documentation I have seen doesn't help me... sad

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For reasons that I won't go into here, I need to run Cache Terminal in Linux using Wine.

It starts up ok, but when I try to establish a connection to a remote server I get the following error:

Ctermsecure Read Error
Could not obtain terminal server client name.
Reason: (10035, 0x2733) unknown error

If I launch CTerm.exe from a command line then I get the following:

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When we are at the starting stage of BI project development, we must remember that it is crucial to select the right tool for its implementation. Today we want to show you how one of the principal functionality of dashboards is implemented in different BI systems. Let's talk about drill down from both points of view: the dashboard development, and the convenience and clarity for the end user. We will touch on the applications of this technology in IRIS BI, Power BI and Tableau.

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Article
· Mar 5, 2021 3m read
Using ECP across IRIS and Caché

Migration from Caché to IRIS can be quite a challenge if your code is grown over many years
and probably not so clean structured as you may like it. So you face the need to check your
migrated code against some reference data. A few samples might not be a problem,
but some hundred GB of data for testing might be.

A possible step could be to have your fresh code in IRIS but leave your huge datastore on Caché and connect both environments over ECP. I have created a demo project that gives you the opportunity to try this based on 2 Docker images with IRIS and with Caché connected over ECP.

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Hello,

We would like to submit a JSON using Ensemble. Here we have the JSON structure:

{
"app_id": "e47322de-64c8-43c5-a1b7-42aa6409eb48",
"headings": {"en":"Cita Atencion Primaria","es":"Cita Atencion Primaria"},
"subtitle": {"en":"C.P. ISORA","es":"C.P. ISORA"},
"contents": {"en": "Next appointment", "es": "Siguiente cita"},
"data":{
"centro": "C.P. ISORA",

"fecha": "yyyy/mm/dd",

"hora": "hh:mm",

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Hi,

Is there any way to set environment variables in Linux from Cache?

I see a way to get an environment variable with: $system.Util.GetEnviron()

Essentially I am converting from VMS (DCL) to Linux.

In VMS we used $ZF(-1,"SETSYM") in Cache to a value and then interpreted that value in a DCL procedure.

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Hello,

I'm trying to set up an Apache server using CSP Gateway on Windows 10 (64-bit), but am getting the error "Cannot load c:/InterSystems/IRIS_2019/CSP/bin/CSPa24.dll into server: %1 is not a valid Win32 application" when attempting to start up httpd.exe after adding the CSP-specific section to httpd.conf.

The CSP gateway is 64-bit (CSPGateway-2018.1.1.643.0-win_x64) and so is the Apache install (httpd-2.4.38-o102q-x64-vc14).

The CSPa24.dll file does exist in the specified location.

Any suggestions appreciated.

Thank you,

Olga

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