How Do You Architect a System without a Load Balancer Being a Single Point of Failure?

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Problem scenario
You want to design a system without a single point of failure. How can you ensure a load balancer is not a single point of failure?

Solution
Have DNS route to two or more load balancers. DNS does not know the back-end servers’ or pods’ health statuses, according to a StackOverflow.com posting. Therefore you would want to configure the TTL governing the networking of the DNS to be short to ensure DNS services are aware of a web server that is down (according to a Quora posting).

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Empowering Electronics Design Engineers with Continual Integration Tools

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Photo by Freepik

In the intricate and dynamic field of electronics design, the journey from the inception of a concept to the realization of a tangible prototype is replete with an array of challenges. The process demands not only a profound understanding of the underlying principles of electronics but also the ability to navigate a labyrinth of intricate details and unforeseen hurdles.

For electronics design engineers and research and development (R&D) specialists,

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How Do You Architect a System without DNS Being a Single Point of Failure?

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Problem scenario
You want to design a system without a single point of failure. How can you ensure a DNS is not a single point of failure?

Solution
Have multiple authoritative DNS servers. To read more, see Networkworld or Medium. We observe that one tradeoff is there is not a single source of truth, but the benefit is that you do not have a single point of failure.

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How Do You Make Internet Edge Print PDF Files on Both Sides of the Page by Default?

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Problem scenario
You sometimes forget to manually change the printing settings. You want to have print jobs use both sides of the page. What should you do?

Solution (Workaround)

  1. In Internet Edge, go to “Print.”
  2. Chose the printer you want.
  3. Set “Print on Both Sides” drop down to be “Print on Both sides.”
  4. Print.

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Why Does the Disk Space Seem Smaller During the Installation of Linux than What You Think Exists?

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Problem scenario
There is unaccounted for hard drive space missing. There is a discrepancy with the hard disk specifications of your machine and what you see during the installation of Linux (e.g., Ubuntu, RHEL, Stream Fedora, SUSE etc.). You are trying to designate an installation destination of the OS. Where is the missing space?

Possible Solutions
There are multiple potential root causes for this situation.

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How Do You Identify or Determine which WordPress Theme Your Website is Using?

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Problem scenario
You see that many WordPress themes can be updated. But you do not want to update a theme that you are not using. How do you find out what WordPress theme your website is using?

Solution
Log into WordPress. Go to Appearance -Themes. Find which one is active and it should say which one it is.

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How Do You See if the quota Has been Properly Enabled?

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Problem scenario
You are running Linux. You think quotas are not properly configured. You run “repquota -au” and see soft and hard limits. You see grace periods. But you are not sure if quotas are enabled or not. What should you do?

Solution
Run this:

sudo quotaon -ap

To enable groups, run this:

sudo quotaon -ag

To enable user quotas,

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How Do You Determine Why the quota System is Working?

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Problem scenario
The grace period says “none”. Clearly the grace period expired. The soft limit has been exceeded and maybe even the hard limit has exceeded. Files are still created. You would expect to see a “write failed…quota reached” or “quota exceeded” any time a user tried to create a new file or directory. What should you do?

Solution
Run this:

quotaon -ap …

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