#Databases

Hey Developers,

Let the voting week begin! It's time to cast your votes for the best applications in the Datasets Contest!

🔥 You decide: VOTE HERE 🔥

How to vote? Details below.

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.

A full cycle project, from initial data initialization, daily update products from the official website, a service for sending a course on request and receiving a schedule for any period.

After installing the project, we will get a table of ruble exchange rates against the main currencies of the world established by the Central Bank of the Russian Federation for 2016-2021. Launching the product service with default settings will allow you to receive daily new exchange rates for the current day.

Hey Developers,

With the release of InterSystems IRIS 2021.2 Preview and all-new LOAD DATA functionality, we'd like to put it to the test with the new DATASETS contest! 

🏆 InterSystems Datasets Contest 🏆

Duration: December 27 - January 16, 2022

In prizes: $9,450

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. 

You'll discover that it's actually a hugely powerful yet incredibly simple storage engine that allows you to model any kind of database you wish, once you understand and master its simple, basic principles.

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

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.

to dismount/mount a database, use Dismount() and Mount() methods in SYS.Database class available in %SYS namespace.
NB: the database ID is its Directory

You'll find  some examples of how to dismount/mount and check if a database is mounted (Mounted=1) or not (Mounted=0), and quickly see all the attributes of a database (via zwrite)

%SYS>set db="/opt/irisapp/data" 

%SYS>w ##class(SYS.Database).%OpenId(db).Mounted                     
1
%SYS>w ##class(SYS.Database).%OpenId(db).Dismount()
1
%SYS>w ##class(SYS.Database).%OpenId(db).Mounted   
0
%SYS>w ##class(SYS.Database).%OpenId(db).

Hi Community, 

New video is already on InterSystems Developers YouTube:

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

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

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.

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.

Is there a better way ? (eg: using Portal or some API from command line).

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

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.

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 ??

https://www.appeon.com/products/powerbuilder

Appeon PowerBuilder is an enterprise development tool that allows you to build data-driven business applications and components.
It is one of a suite of Appeon products that together provide the tools to develop client/server, Web, mobile, and distributed applications.

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)

Thanks you in advance,

Thomas

Hi

Upon creating namespace I selected same database for both Globals and Routines. How can I separate both the databases. Please note that I already have data and code saved in database.

Thanks

We have started to see Journal Daemon inactive and DBLatency warnings in the Console log of our Healthshare server. OS is Windows Server 2008 running in a VM. See below

10/03/18-00:46:39:344 (3840) 1 Journal Daemon has been inactive with I/O pending for 10 seconds:
gjrnoff=6642068,iocomplete=6637348,filecnt=771,fail=0
10/03/18-10:08:47:620 (6064) 1 [SYSTEM MONITOR] DBLatency(c:\intersystems\healthshare\mgr\cachetemp\) Warning: DBLatency = 2300 ( Warnvalue is 1000).
10/03/18-10:08:47:755 (6064) 1 [SYSTEM MONITOR] DBLatency(d:\databases\adtfeed\) Warning: DBLatency = 1251 ( Warnvalue is 1000).

How can you find referenced entries in a table that have been deleted with the drop column?
I have to find all fields in the database afterwards and then delete them properly.
Has anyone had this problem yet?
Can the information be found in the class or storage definitions?
Thanks for a quick feedback.

Trackcare 2021.2

Please may I know  how to access SQL parameter with string as datatype with NO reference to SQL Table and SQL Column.

Hi Experts,

I have these two clarifications to make:

1. I am struggling to understand the process and method of accessing the SQL table with no reference to SQL parameter or Table but string

This is what I tried: Tired to create ERD diagrams and try to extract Primary and Foreign keys to associate, but I cannot in this case

I would like to do something like this

Select * FROM

SQLUser.SS_User SSU

LEFT JOIN SQLUser.CT_Loc CTL ON CTL.CTLOC_Desc = ?

Hi folks!

Is there a way (function) to know the name of the database for data of the current namespace?

I take the case where we have one database for data and another database for code in a namespace.

Thanks!

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

Hi folks!

How do you edit data in IRIS or Caché? What do you use?

Change globals directly via Management Portal?

Change data using SQL?

Use your favorite dev tool? Which one?

Crafted your own?

Share your experience, please?

Hi,

I have a DR member and in this cache server the database "cachetemp" start to getting bigger without any reason (50GB that was all the free disk space we have)

In the members of the mirrors the cachetemp its ok and the size is 31MB.

I restarted the server because I read that the cachetemp database purge when restarting, but didnt happend.

Any recommendation to clean this database? can I just deleate the CACHE.DAT from this database?

Thanks!!!

Hi everyone, 

I am talking from Brazil and we have one very important customer that requested our support to find a consultant, deeply specialized in Cache that could work with us attending this customer. It has a tons of data and its core application is based on Cache.

If you are interested send me an email with the subject title - Cache consultant opportunity - and we will make contact with you. The main request is how strong are your skills in cache and it would be considered a differentiator if you are a portuguese speaker.

Regards - Helberth Cavalcante.

Hello,

We have a need to track Database changes over time - down to the SQL level of granularity if possible. Such as: User xyz runs routine ^abc and we get something similar to a changelog that tells us: table A had this value updated, insert, update etc....

Is that possible using IRIS level tools (Audit Log, Journal File, etc...) , is there a way to convert the global sets and kills from the journals into SQL level changes?

I also found a third-party java-based tool named Liquibase , but it seems more oriented to tracking schema and table based changes or pre-defined definitions.

Thanks,

James

At the heart of IRIS and Cache is a very interesting database architecture that we, at M/Gateway Developments, refer to as "Global Storage".  If you ever wanted to know more about the fundamentals and capabilities of this underlying database, you might want to read a major analysis we've put together:

https://github.com/robtweed/global_storage

Amongst other things you'll discover that:

- Global Storage provides the underpinnings of a full multi-model database, something we refer to as "Universal NoSQL", though, as you already know from IRIS and Cache, it also supports relational too.