Databases and other data stores which treat the integrity of data as paramount often include the ability to handle transactions to maintain the integrity of data. A single transaction consists of one or more independent units of work, each reading and/or writing information to a database or other data store.
The capacity of taking numerous records every second while also facilitating real-time queries simultaneously in real time is called Hybrid Transactional Analytical Processing (HTAP). It is also called Transactional analytics or Transanalytics or Translytics and is a very useful element in scenarios where there is constant flow of real time data coming from IIOT sensors or data on fluctuations in stock market, and supporting the need for querying these data sets in real-time or near real-time.
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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:
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In our clients environment, multiple sources will connect to one DB (all through JDBC connections) and perform various operations. Sometimes they found some data was deleted without reason. Thus they want some feature like SQL Server Database Audit Specifications that can log who at what time with which IP deleted data in a specific DB.
I've checked IRIS Audit but I didn't find feature about that . How can we audit and log delete of a known DB? The deletions might be performed by delete statament or truncate table stattement.
Hi i have rules and i want to log them to analyse what rules executed , I want to add in the log Msg Controller Id, MRN, Value coming in the message, and my customize text telling whats wrong with this field... i have like 50 rules and at the end i can check the log table and found like 20 entries so it means 20 data issues are there for a given message control id. any advice how to to do it
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When performing an update transaction on patient data in GUI Apex 5.8 cache2017, we randomly get a ‘Database Connection Lost’ error. Subsequently the application quits and the incomplete transaction is rolled back.
We have confined its not a network issue as we can still query the database using CHUI Apex when these events occur.
In one of the projects, when we have ECP with 10 ECP application servers, from time to time we faced the issue when our journals fail to purge, due to open transactions. While we have about 100-150 GB journal files per day, it quite quickly became a big issue, and with mirroring a very big issue. Mostly we just rebooted our ECP Data server, so it searches rollbacks any transactions, but such process is too long, may steal a few hours. I did not find any way, how to get the list of the open transactions from one place from ECP Data Server. We just migrated our Data server to 2018.1.
InterSystems IRIS supports a unique data structure, called globals, for information storage. Essentially, globals are persistent arrays with multi-level indices, having several extra capabilities—transactions, quick traversal of tree structures, and a programming language known as ObjectScript.
I'd note that for the remainder of the article, or at least the code samples, we'll assume you have familiarised yourself with the basics of globals:
I have a question about the %OnSave method of a class. We have a class that has two properties that are classes.
Class A.PropertyB as Class B
ClassA.PropertyC as Class C
Classes B and C also need to point back to Class A - it's just the way it is. We need to be able to use any one of these classes and get to the others (it's actually even more complicated than this, as Classes B and C also have a PropertyC and PropertyB as well, respectively) :
It’s often useful to make changes inside the current transaction, that would not be rolled-back if transaction is rolled-back. For example to do some logging.
This can be achieved by using global that is mapped to temporary database -- IRISTEMP. All globals that start with ^IRIS.Temp* are mapped to IRISTEMP by default. Problem with such approach is that IRISTEMP is cleaned on InterSystems IRIS restart, so this log is lost.
What else you can do is -- suspend transaction temporarily, do the logging, and then resume the same transaction.
We recover a large amount of data from an external database (SQLServer, about 1 million rows in JDBC). However, we have treatment time issue. This process takes more than 30 minutes whereas on a "classic" SQL Server Management Studio type request takes less than a minute.
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