Some people talk about security, many people skimp on security, few do security right. Of course, security has many meanings, but in this post I will be discussing physical and online security of data. With the amount of data available today, it is critical that we all take security seriously. In this post, I would like to talk about some of the security issues I have had in the past and a few of my approaches to ensure better security of my data. Read on to learn more!
Cloud Foundry transitioned to the Pivotal Initiative only a few months ago, but the wheels have been turning behind the scenes. News of the pending changes has been released as well as the time table.
So what changes are coming and what does it mean for your applications running on http://cloudfoundry.com today?
In my last blog entry about cloud computing, I answered the question: what is cloud computing? To do this, I defined the term cloud and then laid out some fundamental characteristics of cloud computing. Now, I would like to give a more formal definition of cloud computing. In perusing multiple articles on the topic, it has become apparent to me that there is no globally accepted definition of the term. This is understandable given the fact that cloud computing is still an evolving paradigm. In addition, many definitions that are available lack core and fundamental characteristics of the term.
To answer this question, all you really need to know is what the buzzword “cloud” means. The above article refers to the cloud as a metaphor for the Internet. Personally, I do not think this is an accurate characterization of cloud computing. Rather, I think the cloud, and thus cloud computing, can be more clearly described as follows.
The cloud can be divided into four primary types:
- Public – a cloud that employs the Internet and is available to all
- Community – essentially a public cloud for a limited number of groups and that may employ only a WAN
- Private – an in-house cloud for a single group and that may only employ a LAN
- Hybrid – a combination of public and private clouds that may leverage the ability to transfer data between the two (ex. federation)
Both public and hybrid clouds require the use of the Internet, thus comporting with the notion that the Internet is intrinsic to the cloud. However, to be useful, community and private clouds only require network connectivity (ex. LAN or WAN) and while many may utilize the Internet, most do not require or leverage it to the extent of public or hybrid clouds. As such, the term “cloud” would be better described as a network-based transport layer in which communication takes place over a network connection.
In addition to understanding what cloud is not or not always (i.e. Internet-based), one must also realize there are several fundamental characteristics that should be adopted and made universal to all cloud initiatives. These characteristics include being:
- Network based
- Abstract from infrastructure
- Dynamically scalable
- Completely virtualized
- Fully automated
- Available either as a service or as a product
I know that these characteristics differ today from cloud to cloud and company to company. However, to have a cloud that enables the maximum efficiency from the business and software engineering perspectives, you need to apply the aforementioned fundamentals. I believe they define not only the current trend of cloud computing, but the future direction of the cloud.
The definition of a new technology is not only flexible, but malleable. In cases such as cloud computing, the definition is complicated because of the complex nature of the term being defined. It will be interesting to see how the definition develops over the next couple of years and how my colleagues in the field and I help to shape it. I can only hope that the fundamental characteristics I laid out above make it into the definition.
One of the big news stories over the last couple weeks has been the announcement that EMC’s Atmos Online service offering will no longer be sold commercially. As you can imagine, this announcement is of great significance to Atmos Online customers, but it should not come as a surprise. As Chad over at Virtual Geek pointed out, Atmos Online was always intended to be a proof-of-concept and nothing more. He posted a good article about the changes entitled: Understanding what we’re doing with Atmos. In this article he highlights his views on the recent news. I would like to make a couple comments in regards to Chad’s article. Please be advised the views below are mine and do not reflect EMC’s stance on the topics.