A Technical I.T./DevOps Blog
Problem scenario
You would like a larger font edition of Atlas Shrugged (a fictional book that involves technology). Is there an option?
Solution
Maybe. There is a smaller edition (width and height) that is roughly ~4.2″ X ~6.8″; if this is the size you bought, you would prefer the Centennial Edition that is ~6.1″ X ~9.1″ version at Amazon or Barnes &
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Continue reading “Is There a Large Print Edition of Atlas Shrugged by Ayn Rand?”
Problem scenario
Using a RHEL server in AWS, you want to deploy Apache Tomcat. How do you do this?
Solution
Use this command to install it: sudo yum -y install tomcat
To start the service, run this command: sudo systemctl start tomcat
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Continue reading “How Do You Install Apache Tomcat on an AWS Instance of RedHat Enterprise Linux?”
Problem scenario
You wear gloves in cold weather. You want to keep your fingers warm because your hands dry out if they are exposed to cold wind. Many cell phones have touch screens that don’t work with regular gloves. How do you use a regular modern cell phone with gloves?
Solution
Buy mitten gloves or smartphone gloves.
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Continue reading “How Do You Use a Cell Phone in Cold Weather?”
Problem scenario
You want to install GraphQL for Python in Linux. What should you do?
Solution
python3 -m venv to_test
cd to_test
source bin/activate
pip3 install graphql-python
pip3 install flask ariadne flask-sqlalchemy flask-cors …
Question
In I.T. what is pipelinization?
Answer / Disambiguation
The configuration, creation, or execution of a repeatable process that involves a series of stages with a start and finish. Another definition of pipelinization would be making a procedure into a controlled stream (for reproducibility for parallel and independent development or parallel and increased throughput of the original process). A final definition would be adopting a manual or automated process by developing a sequence of substeps for a [batch] job to incrementally pass through.
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Continue reading “What is Pipelinization in Technology/Computing?”
Problem scenario
Some updates are essential for security. In some situations a patch to an OS or an application may cause some clients to have problems connecting to the server. The ramifications could apply to middleware or other applications. Is it a best/recommended practice to push an update to a server’s OS or application when other clients or smart phone apps will not be able to be compatible?
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Problem scenario
You know that an admission controller in the API server has various stages to process a kubectl command in Kubernetes. You want to know how the API server or relevant admission controller works in the correct sequence. The sequence starts with a request (HTTP POST from a kubectl command) and ends with updating etcd. How does this happen in detail?
Solution
The API server’s process of handling a kubectl command is very similar to what are called “admission controller phases.”*
It is not clear what is the difference (if there is any).
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Problem scenario
You have read about “branching by abstraction,” but you do not know what it means. You read that it is ideal when the coding you are doing cannot be done incrementally. How do you “branch by abstraction”?
Solution
It is a method of trunk-based development; instead of using a branch, you commit to the trunk (or main) branch of your repository.
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Continue reading “What Does “Branch by Abstraction” Entail?”
Problem scenario
You are not sure if Log4j is acceptable to use. It is a best/recommended practice to use Log4j?
Answer
Maybe.
Log4j has been well-adopted by many of the most trusted companies in the I.T. industry. According to cybersecuritydive.com “Fortinet, IBM, Microsoft, Red Hat, Salesforce, and Siemens” use(d) Log4j. Log4j has been vulnerable since 2013 (according to this external website).
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Continue reading “Is It a Best/Recommended Practice to Use Log4j?”
Problem scenario
There are sources that recommend database normalization as a best practice for relational databases. Is it always a best practice to normalize databases?
Answer
There is no clear answer as the sources vary.
A heavily voted-up answer on StackOverflow says that denormalization for OLAP performance is something to be avoided. We find recognition of this “best practice” on a venerated engineering blog:
Keeping data normalized is considered a best practice in MySQL.
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Continue reading “Is It a Best Practice to Normalize a SQL Database?”