#Caché

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InterSystems Caché is a multi-model DBMS and application server. See more details here.

Documentation.

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Article Alexey Maslov · Nov 12, 2016 14m read

This article is about how to gain as much transparency in controlling processes in ECP environment as in traditional (non ECP) one.

The technology of load balancing between several servers with relatively low capacity has been a standard feature of Caché for quite a while. It is based on the distributed cache technology called ECP (Enterprise Cache Protocol); note that we are referring to “cache”, not “Caché”, here. ECP provides a host of possibilities for horizontal scaling of an application, ensuring high performance and fault-tolerance, and yet keeping the project budget fairly low. Another apparent advantage of ECP network is the possibility to conceal its architecture in the depths of Caché configuration so that applications developed for the traditional (vertical) architecture can be fairly easily migrated to a horizontal ECP environment. The ease of this process is so mesmerizing, that you start wishing it was always this way. For instance, everybody is used to having a possibility to control Caché processes: the $Job system variable and associated classes/functions work magic in skilful hands. Stop, but now processes can end up being on different Caché servers… The text below is about how I managed to cope with this problem.

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Question Ferran Olle · Nov 23, 2016

Hello,

Our Intersystems Cache database is running in a Windows 2008 R2, and is installed and configured as "UNICODE" .

We are using Apache+PHP with  ODBC to get data but we have some problems with character encoding.

We also have two configurations:

  • Ubuntu 16.04 LTS + Apache2 + PHP 5.6 + UnixODBC
    • using isql command everything works fine, data returned is OK   (all special characters  in Spanish displayed ok).
    • using PHP with  PDO function to connect the database and libcacheodbcu35.so driver
      • with  default_charset=""  in  php.ini
      • Special characters in spanish not displaying   (  like   ü , é , ó , à , .
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Article Gevorg Arutiunian · Jul 17, 2018 1m read

The following code snippet contains a class method "test" that determines the value of a specified property for an instance of its class:


/// get property value within class by indirection
Class objectscript.getPropOfThisClass Extends %RegisteredObject
{
// extra code to help test
Property myProp as %Integer;
// need to instantiate an object to access property value
method test() {
	// extra code to help test
	set .
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Question sansa stark · Nov 29, 2016

Hi all,

    i need one help regrading telnet.In cache 5.02 while we take telnet it open some program(By using ^login Global in %Sys nameSpace).But i could not create same process in cache 2016.

example:

telnet 127.0.0.1 it open some routine in "TRAIN" namespace.

Thanks,

Sansa.

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Question Arpitha Ramakrishnaiah · May 11, 2017

Hi,

I would like to know if there is any code to compare and update two directories/namespaces for class files.
If file is present in directory1 and not present in diectory2, it should import the classfile.
If file is not present in directory1 and it is present in directory2, the corresponding file should be deleted from  directory2.

Please suggest code for the task.

Thanks,
Arpitha R

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Question Soujanya Naganuri · Jun 20, 2017

In Oracle sql Developer, you can still listing the records in a desk the use of the statistics tab when viewing a desk. there where can add, delete, edit or just viewing facts of desk currently viewd

the trouble is that we regularly actually need to view a couple of table immediately, then we want more than one tab opened, issue that i dont recognise how to do that, any sugestion. tq earlier

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Article Eduard Lebedyuk · May 9, 2017 6m read

Introduction

If you manage multiple Caché instances across several servers, you may want to be able to execute arbitrary code from one Caché instance on another. System administrators and technical support specialists may also want to run arbitrary code on remote Caché servers. To address these needs, I have developed a special tool called RCE.
In this article, we will discuss what are the typical ways of solving similar tasks and how RCE (Remote Code Execution) can help.

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Article Mike Kadow · Jul 22, 2016 2m read

NewBie's Corner Session 14 Inline Do & Nested Do with Implied Quit and For Loop

Welcome to NewBie's Corner, a weekly or biweekly post covering basic Caché Material.

InterSystems Caché provides a GUI (Graphical User Interface) based Integrated Development Environment (IDE) called Caché Studio. Developers can use Studio to create and maintain applications.

The following concepts of Inline Do, Nested Do, Implied Quit and For Loop is difficult to explain in a manner that everyone understands. However, these concepts work well with each other.

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Question sansa stark · Dec 8, 2016

Hi All, I am taking a namespace and routines from one table for particular user.if the user have name space and routine means it execute well but after executed the routine it is automatically quit and close the session.I need to keep the same namespace after executing the routine. Please help to proceed further anyone.

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Question sansa stark · Dec 1, 2016

Hi All, I configured the crystal report SAP 2011 with IIS 10 in windows server 2012 r2 standard,when I tried to open it shows failed to open the connection error .database is Cache.how to recover that problem.

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Question Chris Thompson · Dec 20, 2016

Currently we have a setup where we have an external IIS webserver that our CSP Gateway sits on that routes requests to our ensemble server. When working with soap everything was routed to the CSPms module since the site's handler mappings have *.cls going to this module. However, now that we are working with rest services that don't have a file extension we will have to have all traffic on the IIS box be routed through the CSPms module. 

I was curious if anyone has encountered this type of issue, and if so, what steps did they take to resolve it?

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Question Alexey Maslov · May 11, 2017

Since most of our customers moved to Cache 2015.1, I found some admins abused with CPUPct warnings (sometimes alerts) in console log without other signs of lacking CPU power.
Documentation states that:

          CPUPct               job_type              CPU usage (percent) by all processes of the listed job type in aggregate       

What does it really mean?
E.g., if total system CPU usage is 25%, and all running processes are of the same type (e.g, CSPSRV), would CPUPct be equal to 100%? If so, why this case should be a reason for alert?

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Question Stella Ticker · Jul 7, 2017

There is a need to send a SAML token from a local cache web application to an external web application in order to grant these cache web app users access to the external web app. Is it possible to use SOAP SAML token functionality to do IDP initiated authentication with Cache acting as the IDP server? The example in this online course shows a code snippet of the service web method that adds  the token to the outbound SOAP message. So I am assuming , this would be returned to the client in response to a client request of some sort.

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Article Cameron LaHart · Nov 22, 2016 2m read

Configuring Java with InterSystems Technology

Regardless of what InterSystems technology you use to design your applications, it is likely that some of our product functionality will require that Java be installed on the operating system, and subsequently be configured properly with your InterSystems based application. There are many ways that this can be accomplished depending on your operating system, as well as the specific InterSystems technology you are integrating with.

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Article GUILHERME CRUZ DA CUNHA · Jun 14, 2018 3m read

Let's create a class in Caché that will represent a teacher registry of a
University:

The name of our class will be Professor. Let's create it on
university package. To do so, make sure that your Caché
is in the Air (the small cube in your System Tray should be blue) and
right-click it, then click the
Studio, as shown in Figure 4.
When Caché Studio opens, make sure that you
is in the USER namespace. Just go to the File menu, and select the
Change Namespace option. Choose the USER namespace and press
OK.

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Article Thomas Carroll · Sep 17, 2016 2m read

Embedded SQL is a tool that allows us to execute SQL statements in Caché Object Script. For example, to select the name of a person with a particular SSN from the Sample.Person class

&SQL(

Select Name into :tName

From Sample.Person

Where SSN = :tSSN

)

The colon syntax is used to identify local variables, in this case tName and tSSN. &SQL indicates to our compiler that this is SQL syntax. At compile time, this statement will be optimized to executable Object Script code. More about this syntax can be found here.

http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?

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Question Peter Kopp · Oct 11, 2016

Good morning, I am using a <Image/> tag, in a <Tab/> tag, of a <TabGroup/> to render a tif image. I would like the tif file to be rendered full size. However, I have not been able to achieve this using the height="100%"  and width="100%" parameters available. All I get is an envelope with scroll bars, with perhaps a quarter of the image visible at any one time. Thank you in advance for any and all feedback.

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Question PILAR GUERRERO · Jun 26, 2017

Hello,

I have a problem when i take the adapter: EnsLib.FTP.OutboundAdapter. 

I want to write a file, but if the file already exist using the method ..Adapter.PutStream(name,file) and in my setting "overwrite" is true. FTP response me this message:

<descripcion><![CDATA[ERROR <Ens>ErrFTPPutFailed: FTP: error al colocar archivo '803430600001072790112416-19941214-1233287355C-347.pdf' (mensaje='Error in SFTP Put('D:\Ensemble\ABC\NAMEAPP\NAMEAPP_G\stream\HnhZ32Fb1WDatA.
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Article Katherine Reid · Jun 15, 2016 1m read

Question

 What version of Caché supports TLS v1.2? 

Answer

Caché uses the openssl library for SSL/TLS support.  On Windows, Linux and Unix, a version of this library is included with the install kit.  Caché 2014.1.3 and 2015.1.0 ship with the openssl 1.0.1j library.  TLS v1.1 and v1.2 support is first available in openssl version 1.0.1, so Caché 2014.1.3 and 2015.1.0 are the first versions to allow the use of TLS v1.1 and v1.2.

On these versions, if the "TLS v1" checkbox is checked in an SSL/TLS configuration, the system will use any of TLS v1.0, v1.1 and v1.2 .

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Article Carter Tiernan · Sep 21, 2016 1m read

Overview

The The System Monitor Dashboard project is, most generally, an open source extension to the Cache System Monitor.

More specifically, it allows users to customize the monitoring of a Cache environment as well as how the collected data is visualized.

Goals

  • Displays important system state and historical information in an accessible and useful way.
  • To provide an intuitive and complete API for users to tailor the Cache System monitoring to their specific needs.
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Question Mike Kadow · Apr 26, 2017

I need some help on navigating through the DC.

I never know where I am, what comes next, what was previous.

Do I just mindlessly go from post to post? 

A least when I use to receive email on the posts, I had some control.

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