What is the difference between a quasar and a blazar?

Question by TheOriginalNerdNumber2: What is the difference between a quasar and a blazar?
And why is that difference important?

Best answer:

Answer by Ricky
A quasar is a very energetic and distant galaxy with an active galactic nuclei. A blazar is just a much more compact and energetic version of the same thing. Blazar’s are usually associated with very small, dense galaxies with much more powerful nuclei than quasar’s.

Hope this helps 🙂

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Q&A: difference between client server and cloud computing?

Question by : difference between client server and cloud computing?
What is the difference and similarities between cloud computing and client server computing technology. please if anybody know, write your answer…

Best answer:

Answer by Chris D
“Could computing” is the latest technology buzz-word but it’s actual meaning varies. When people say could computing they are mostly referring to storing your data “online”. What’s really happening is you are storing your data at another location usually operated by a 3rd party. The down-side of cloud computing is that it requires a constant internet connection, varies depending on your connection speed and the data is not in your personal possession. The data is being stored at another facility by a 3rd party. You have to reply on that 3rd party to protect and secure your data.

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What is the difference between the cloud and the “old school” client/server systems?

cloud servers
by eflon

Question by MT: What is the difference between the cloud and the “old school” client/server systems?
Wouldn’t a connection to a cloud be the same as the days of a dummy terminal connecting to a server? A cloud seems to be just like the client/server systems of the olden days except you have more storage space and it is through the Internet. Am I missing something? It seems a cloud is simply a version of the old school client/server system where the client can be any terminal usually called a dummy terminal (in today’s case a smart phone or computer) connecting to the cloud which is a server. The only difference is the dummy terminals of today have a lot of memory and microprocessors when the dummy terminals of the past could be a simple keyboard and monitor with no memory. What is the difference between the cloud and the client/server system of days past?

Best answer:

Answer by johntrottier
First – The previous person to answer this question was way off base
I apologize on behalf of those who enjoy and use YA as a way to share knowledge and help others

Your point is completely valid.
The only major difference between the old model and the new one is that the old system was text only, being limited by the comparatively primitive network systems of the time.
The current model is just client/server updated with graphics capabilities and a lot more bandwidth.

It’s a marketing ploy – designed to separate us from our our hard earned dollars.

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Cloud computing whats the difference?

Question by Cookie Monster: Cloud computing whats the difference?
I’m not really understanding the difference between cloud computing and regular server hosting. Doesn’t a cloud still have to be hosted on a somewhere? I understand that a cloud is just something where people put a website, or some data that someone can access anywhere and we can increase decrease the amount of clouds based on the amount of traffic.
But how is the accessibility any different than regular server hosting and where is a cloud hosted?

Best answer:

Answer by swalih
1. Firstly, “cloud computing” is a vague term created by marketing as a set of features, and diluted by sales people pushing services when applications aren’t obvious to their customers. I will assume we’re mainly discussing elastic computing and any technologies necessary to implement that, like hypervisors and distrubuted storage.

Elastic computing is a tool to scale your computer power up and down as needed. It’s related to time-share, but instead of one large mainframe to rent server time on, you’re given a large cloud of servers to rent or share. You can script the start and closing of additional nodes, to match your use of the cloud to demand for the services those nodes offer.

The important distinction between elastic compute clouds and normal hosting is provisioning. Imagine you run a website that publishes football scores, and you’re very popular. To make a profit you need to keep the website responsive under heavy load. We’re talking Superbowl heavy load. Constant refreshes and sustained traffic for hours. In order to meet that goal, you could buy a massive server farm that can handle Superbowl traffic, and let them sit mostly idle during the off-season. Or you could buy server time from an elastic compute cloud to make up the difference. Normal hosting services may choose to simply fail during high load, with catastrophic effects on your Superbowl revenue. They may even kick you off for too much CPU use or network traffic.

Economically, cloud computing allows for full employment of servers. Rather than have everyone buy lots of beefy hardware in case of Slashdot, the hardware that would serve Slashdotters can migrate to the sites that need it (and pay for it). Combined with economies of scale, we can expect that large compute farms may become cheaper than hosted or colocated solutions. If APIs are created to migrate servers between clouds, additional competitive forces may help drive prices towards marginal costs; hence the chasm between Amazon and the Cloud Computing Bill of Rights. Some are proposing a cloud marketplace, where cloud computing is bought and sold by principles of supply and demand. This would encourage people to shift compute power to off peak hours, as we see with cell phone plans and industrial use of electricity.

The reasons to stay away from cloud computing are twofold: price, and privacy. None of the above guarantees cloud computing will be cheaper than your current solution. You may be fine with failure during Superbowl events. Or it may be cheaper for you to build and buy your own servers and datacenter. Alternatively, you may have data you would prefer not reside in the hands of anonymous cloud vendors whose security and technology may leak information about your service or your customers. The last part means you may in fact be legally impaired from implementing cloud computing, as the cloud vendor has access to your disk and RAM.

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What is the difference between a web host like Joyent and a basic hosting company like GoDaddy?

Question by PJ: What is the difference between a web host like Joyent and a basic hosting company like GoDaddy?
I’m trying to figure out which company to use for hosting the database that will be required for my small business. The business helps clients crunch certain information using a database (likely written in php).

I was referred to Joyent and it looks like a solid cloud host, but I’m also familiar with GoDaddy and they are much cheaper. Are they in the same ballpark in terms of what they can offer?

Best answer:

Answer by Deep Purple
I haven’t tried Joyent but I’d stay away from godaddy.
Personally I have found IX to be the best of the lot.

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What’s the difference between cloud computing and hosting on a online web server?

Question by Penny: What’s the difference between cloud computing and hosting on a online web server?
Could somebody please explain to me what cloud computing is in laymen’s terms?

Best answer:

Answer by Keith M
In practical terms, there is no difference. Cloud computing is just a buzzword that means a lot of different things depending on what company is selling something. In general terms the term “cloud” means “don’t worry about how, it just happens and it just works”.

Cloud computing, to me, is simply the provision of technology-based resources (processor power, storage, networking) on demand, just like the power company provides you with electricity to the plugs in your house.

If you want to read a bit more about it check out the Wikipedia entry at http://en.wikipedia.org/wiki/Cloud_computing

For an example of a currently available, real-world and seemingly successful cloud computing service, check out the Amazon Simple Storage Service (S3) at http://aws.amazon.com/s3/ . Other examples include Yahoo! Mail, Hotmail, and the Google search engine. They all run “in the cloud”. They don’t run on YOUR PC, right? 😉

If you REALLY want to read more about it go to the library and get a copy of “The Big Switch” by Nicholas Carr. I’m just starting to read it and it’s very interesting, not “techie” boring stuff, but “big-picture, history-making-and-changing innovation” kind of stuff.

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