A Quick Guide to Kubernetes Persistent Storage (Gilad David Maayan )

 

What Is Persistent Storage?

Persistent storage, or nonvolatile storage, involves using data storage devices that can retain data after the device is powered off. The Kubernetes architecture initially offered only ephemeral storage volumes that were bound to the lifecycle of containers.

This type of storage works for stateful applications but does not allow you to retain data beyond the scope of the container. Later versions of Kubernetes storage introduced persistent storage volumes that enable you to build stateful applications.

Cabling Problems? 100 Mbps vs 1 GBps

What could possibly go wrong? I plug the cable in, get a link light, ping something and ensure there are no issues; I’m done, right? We’ve all done it a million times right?

I replaced two older switches with ones that support gigabit speeds. Followed the same routine that i mentioned earlier, the lights are green and tested fine with a couple of pings.

The other day I decided to do a Speedtest between two computers that traversed both switches. To my surprise, the speeds were less than 100 Mbps. So, I thought, why not document the troubleshooting steps so I could help others who might encounter the same issue.

Find Your Security Vulnerability Before Hackers Find It For You

 Every Network Has a Security Vulnerability — Where is Yours?

One of the top questions on the minds of network security personnel is "how do I reduce my security risk?" Even for smaller organizations, this is important because every network has a weakness. But do you know where you are the most vulnerable? Wouldn't you like to fix the problem now, before a hacker exploits it?

It Doesn't Take a Brain Surgeon (Paul W. Smith,)

 

For many of us, college is that season of life when we are compelled to choose a career path, long before we have any idea of who we are or what we want. Back in my college days, many of my fellow students were the progeny of doctors, lawyers and engineers who saw no other viable option than to follow in the footsteps of their parents. Others who had a propensity to argue chose to pursue the law, while those geeky types who were always taking things apart as kids went into engineering. And those rare students with a 5.0 GPA (how is that even possible?) and whose faces were always buried in a book? They were destined for Med School.

TAP versus SPAN, RSPAN or VACL?

Is using a SPAN port a viable data access technology for today’s business critical networks, especially with today’s ever increasing pressure to satisfy Data Security Compliance, Lawful Intercept and Deep Packet Inspection requirements? In today’s world we now have the GDPR requirements that “Require” 100% data inspection and retention! Plus, Deep Packet Inspection with Firewalls must have full visibility of every frame and part thereof!

So “REAL” TAPs both Electrical and Photonic are even more in demand!