persistent data for docker and the cloud

There are two types of data when we talk about computing, non-persistent or temporary data, and persistent data.

Non-persistent

Temporary data has a sliding scale also,

• a random number for a decision in an online game; required but lasts less than a second,
• a session ID for tracking your login details on a website; usually lasts for the length of that session, upto about 30-45 minutes,
• the contents of a shopping basket at an online shop; amazon keeps this for days, even years.

software design principles according to Neil Millard and John Romero

This week ‘ I’ve been mainly checking ‘ Infrastructure As Code, IAC for a new mongodb cluster. One of my design and implementation principles states:

• only pay for the server, when your team needs it

Work from home, is it working?

The theme of the week has been geography. Listening to Startup CEO, in which Matt Blumberg states strongly, that having a central office for as long as you can is important for that human connection, serendipitous conversations and culture. This is in contrast to virtual or home working. How connected are we to physical geography and at the same time, connected to a virtual world?

Do you have Fun at Work?

What sort of question is that? I don’t know about you, but I feel privileged and happy that I enjoy what I do at work, and would even go as far to call it fun. I want to be remembered for making work fun for everyone.

Security Groups

I ran into a couple of problems this week involving security groups A security group acts like a virtual firewall on your instance. It controls what traffic enters and leaves and is attached to an instance on start.