Author Archives: cloudtech360

Docker Explained.

This week in class we’ve gone over UML Diagrams and the importance of being able to translate back and forth between writing code from the diagram and making a diagram based on the code. The professor told us to download Visual Studio and Docker, which I’m assuming will be used for the entirety of the semester. I didn’t have a single clue as to what Docker was or why it may have been needed. After a brief explanation prof told me to do a little bit of reading myself and so I did. I’m by no means not a Docker expert but the picture has become a bit clearer.

Docker is a container based application that allows you to run services independent of each other. Containers tend to be pretty compact and only carry the information neccesary for a service to work. Docker containers are created through docker images. An image is basically just a template that tells the system how to make the container. An image can consist of many layers, of which each layer is just a previous working version of the image. It’s important to note that an image is read-only. The purpose of the image is to load the container. The top most layer (when the container is created) is what the user works with, whether it’s making changes to the container itself or using the tools that come with the container. When reading about how this technology works the thought of how something like this could be secure kept on swimming through my mind but as each layer of the image is created it becomes a completely new and immutable image. I’m still not entirely sure how this works and will have to spend more time trying to understand, but for now I’ll just take it for what its worth.

Where Docker really becomes a useful tools is in its portablilty and reusabilty. For example, the use of a virtual machine to run certain programs or applications isn’t frowned upon, but it does tend to be costly in terms of using space and memory. A 500MB application could take heaps of memory to run because the guest OS and libraries would need to run before being able to use a desired application. If you wanted to run multiple instances of that application you would need to run multiple VMs. That’s where Docker delivers and gives the user what they need in terms of reusability.

Now Docker containers are not a one stop shop when it comes to solving issues. If a user is trying to use multiple servers and tries to adminstrate them only using Docker containers, they will find themselves in a pinch due to the stripped down capabilties of a container. A container only holds enough information for what actions are necessary to ensure task completion in terms of portabilty. In a scenario like this you would probably want to stick with using a VM to get the full use of the OS and all it’s resources to maintain multiple servers.

Here’s two videos that brought me up to speed on just what type of software Docker is and why it is extremely useful in just over 15 minutes. The explanations are given in a low level manner that allows people like me who couldn’t even begin to understand the concept grasp it better. I hope you enjoy the content, I did!

Containers vs VMs https://www.youtube.com/watch?v=cjXI-yxqGTI
Containerization Explained https://www.youtube.com/watch?v=0qotVMX-J5s

From the blog CS@Worcester – You have reached the upper bound by cloudtech360 and used with permission of the author. All other rights reserved by the author.

POGIL… the way we’re learning.

POGIL is an acronym which stands for Process Oriented Guided Inquiry Learning.

We’re using this style of teaching in my Computer Architecture and Desig… One of my Software Development courses this semester (the name of the course is significantly long). I can see how this style of teaching can be beneficial to showing how teams get work done in the real world. Each person in the team has a role that they must fulfill. In almost all the groups there are four participants. Each person will have to fill one of four roles; Manager, Recorder, Reflector, and Presenter and be responsible for that role solely. While we are all working as a team to achieve a common goal, I do find it particularly difficult to not impede on my teammates roles and essentially “do their job” for them. I’m not saying that my teammates aren’t doing their jobs adequately. For example, it seems like a far easier task to correct a typo our Recorder has made in our write-ups, but instead I remind myself to tell my teammate “Hey you may have spelled this word wrong, could you go back and fix this please?” While this seems silly the practice makes some type of sense to me.

There’s a joke a friend told me once.

“How many Software devs does it take to fix a light bulb?”

“…”

“None, it’s a hardware problem.”

I must admit he got a hearty chuckle from me when he delivered the corny joke, but there is some truth to this. Each department in a company has a team of people who’s expertise is in a certain area. While they maybe able to fix something that may have gone wrong, their time is a precious resource that they could utilize to focus on other important tasks than to be bogged down by a task that is someone else’s job. While I did highlight a strong point of this type of strategy, I also want to note that I can see how this type of strategy can cause more time to elapse while getting a task completed, but in a sense it is the least complicated way of getting work done I suppose.

In certain settings there may only be one answer to getting a problem correct. But the pathways that lead towards that answer may be limitless. This is where the POGIL approach seems to put its emphasis on its effectiveness of getting students/participants to realize that “logical thinking and teamwork are prized above simply getting the ‘right’ answer”.

You can read more about POGIL here. https://pogil.org/about-pogil/what-is-pogil

From the blog CS@Worcester – You have reached the upper bound by cloudtech360 and used with permission of the author. All other rights reserved by the author.

Take II…

I haven’t touched this thing since I first created it 4 years ago, so let’s try this again. If you’ve read the previous post you might know me by now. If not, hello, my name is Emmanuel. After a 4 year hiatus and a little bit of growing up, I’ve decided to continue my studies and finish completing my undergraduate program in Computer Science at Worcester State University. A semester long assignment in my Software Construction, Design & Architecture course is what led to the creation of this blog. I imagine this blog will be used to capture my progress throughout this course and maybe even other courses during this semester. Things like recording my successes, failures, and frustrations are all things that I want to be express in this blog. If possible I would like this blog to become an extension of myself. If there ever comes a day where I revisit this space, I hope to be able to reminisce on this current stitch in time and be able to relive or remind myself of the moments when I worked so hard to get something to work or understand a concept (or not). Who knows? Maybe I’ll end up using this thing as some sort of culmination of all my work, or a diary of some sort. Anyway here’s to a semester of hard work, and probably lots of sleepless nights.

From the blog CS@Worcester – You have reached the upper bound by cloudtech360 and used with permission of the author. All other rights reserved by the author.

The Intro To This Space…

Greetings!

My name is Emmanuel Braxton but since we’re friends you can just refer to me as Braxton. I am a Computer Science major at Worcester State University and the creation of this blog is (and will be) the result of my semester wide assignment for a course I am currently taking in my Software Development concentration. This is my first blog and I am super excited to not only get this this thing underway, but also to document my growth along the way. I am looking forward to sharing all the things I find interesting, my thoughts, failures, and successes on my path to becoming a software developer. I hope you’re watching too!

Braxton, out!

From the blog CS@Worcester – You have reached the upper bound by cloudtech360 and used with permission of the author. All other rights reserved by the author.