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.
We have a need to mount remote databases using ECP, but with the Application servers mounting some of the remote databases as Read Only. The Data servers will keep them R+W as normal.
In this article we are going to show the results of the comparision between IRIS and Postgress when handling Astronomy data.
Introduction
Since the earliest days of human civilization we have been fascinated by the sky at night. There are so many stars! Everybody has dreamed about them and fantasized about life in other planets.
This formation, accessible on my GitHub, will cover, in half a hour, how to read and write in csv and txt files, insert and get inside the IRIS database and a distant database using Postgres or how to use a FLASK API, all of that using the Interoperability framework using ONLY Python following the PEP8 convention.
I was trying to create a query that can be exposed as a stored procedure (function actually) that would return a resultset with a random number of columns.
Unfortunately, it seems that unless I specify the ROWSPEC annotation on the Query method, I won't get any columns exposed. I was hoping to implement QueryNameGetInfo method and specify the names and number of columns I would be returning dynamically. But it seems that GetInfo information is simply ignored.
Sometimes you need quickly and easily import data into IRIS. For this, an IRIS import manager has been developed.
This application allows you to import JSON data and also provides a really simple interface for transferring data from MongoDB collections to IRIS globals. It has never been so easy.
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:
I work on deploying IRIS inside Docker container. I really like %Installer class can automate many steps. I want to establish an ECP connection to a mirror database and then define a remote database on the application server. I have already seen we can create local database and namespace in %Installer. What code is needed to establish ECP connection?
This is a self contained class that can be run from the Intersystems Task Scheduler which records peak usage details for databases and licenses built up throughout the day and retaining 30 days history.
To schedule the task to run every hour:
d ##class(Metrics.Task).Schedule()
You can also specify your own start time, stop time, and run interval:
d ##class(Metrics.Task).Schedule(startTime, stopTime, intervalMins)
Metrics are stored in ^Metrics in the namespace that the class resides in/is run from.
Hi I am getting below error while upgrading cache instance. Please suggest.
Error: ERROR #70: *** Error while formatting volume because
ERROR #18: failed creating a new volume initializing CACHETEMP, /*****/databases/cachetemp/ - Shutting down the system
An error was detected during Cache startup.
** Startup aborted **
I (really) spent hours on finding the maximum size a Global is allowed to be (for Windows, if that matters). All I seem to run into are database sizes (derived from a max number of blocks and block size), but I refuse to believe that is correct because too small to be realistic.
We are currently using Ensemble on AIX. We are on 2015.2.2. If I install Field Test on a windows desktop, is it possible that I can import the Cache.dat from my AIX server, so I can do some Proof of Concept development?
I would like to schedule the Database Compact and Freespace methods as legacy tasks.
Has anyone implemented this yet? Is this even possible?
The request for this is due to the fact that we have 3 interfaces in a namespace whose messages are deleted after 7 days. All other messages in this namespace should be kept for one year. This leads to a certain fragmentation. Furthermore, the messages to be deleted are relatively large (MDM^T02 > 32MB), which in turn leads to a fast growth of the database size.
I'm trying to load some data into IRIS using LOAD DATA in the IRIS terminal however I am getting blocked by this error. I have read the documentation on this page trying to set up a gateway connection but get the same Connection cannot be established error.
I know that 1-1 relationships are not officialy supported by intersystems cache/iris so I want to know the best way to store data with this kind of data model.
Currently I have two classes that where implemented some time ago:
Table A with a relationship type one on table B
Table B with a relationship type one on table A
To compile I have a double compile with qualifyer U.
What is the best way to implement a data model with 1-1 relationships?
How do I organize a wildcard search with respect to a database search?
Example of what I am trying to do: s x=$o(^G("ABC","A*",x))
Trying to navigate through the ^G global for all occurrences of "ABC", and "A*" ("A"+wildcard) but I am new to M and don't know positively how to do this. Perhaps I don't use an "*" at all, rather; another convention altogether.
If you want to import data from a mySQL export file (exported with mysqldump), you will find here a little script that could help.
Only the INSERT commands in the sql file are executed into Caché. Indices are not computed for better performance. %NOINDEX, %NOCHECK and %NOLOCK are generated on each INSERT line.
Currently, the file can not contain a "),(" pattern inside the values part of the INSERT command. If this is the case, the line is skipped. This feature may be implemented in the extractValuesList method.
I am trying to get the time difference between two time stamps one is recorded earlier to the one happening current but the problem is sql expect string while I have the other stored in a variable and if I do the following I get errors any help please
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