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Posts Tagged ‘Xen’

 

GoGrid Proactively Responds to Xen Vulnerability

Wednesday, June 20th, 2012 by

GoGrid regularly reviews, analyzes, and ranks recently published security vulnerabilities as part of its security program. We typically address security vulnerabilities that pose a risk to GoGrid’s digital ecosystem during our regular patch cycle. However, critical security vulnerabilities require immediate action. Such was the case with last week’s security advisory that impacted software such as Xen, FreeBSD, NetBSD, and some versions of Microsoft Windows. You can find specifics of the security advisory here: http://lists.xen.org/archives/html/xen-announce/2012-06/.

vaultThe vulnerability meant a system admin running a 64-bit paravirtualized (PV) guest (such as Windows 2008 R2 or a Linux 64-bit distribution) on a 64-bit hypervisor could gain kernel-level access by successfully exploiting Intel’s SYSRET design implementation. This vulnerability isn’t unique to Xen or even to virtualized environments. In fact, any guest user—that is, someone with non-administrator privileges—with logical access to a stand-alone server running NetBSD, FreeBSD, Microsoft Windows 7, or Windows 2008 R2 can perform a similar exploit against the OS and gain unauthorized access.

GoGrid’s Security team determined that the vulnerability exposed our customers to an attacker potentially gaining access to their virtualized systems. Even more important, GoGrid’s Security team determined the vulnerability was a prime target for a “zero-day exploit”—one that could occur on the same day the vulnerability becomes generally known.

As a result, we took immediate action: We downloaded and tested the patch, engaged on of our outside security firm partners to gain intelligence on how the Black Hat community perceived the vulnerability, scheduled an emergency patch rollout over the weekend, and deployed the security patch across all impacted systems.

On June 18, 2012, GoGrid Security team confirmed that an exploit had been published and is now circulating on the Internet.

We appreciate your understanding and support in allowing us to continue providing you with a safe, secure, and stable environment.

The Actual Truth About the Economics of Cloud Computing

Thursday, May 26th, 2011 by

Don’t let the media fool you. Which of these actually make cloud computing financially compelling?

  1. Super cheap power, such as hydro-electric
  2. Shipping container datacenters
  3. Massive datacenters
  4. Blade servers
  5. Datacenters with super-efficient cooling
  6. VMware virtualization licenses
  7. Pay-as-you-go pricing
  8. Automation
  9. Shared platforms
  10. Commodity hardware

The answer is NOT “all of the above”! If you said “pay-as-you-go pricing, automation, shared platforms, and commodity hardware” then you win. In fact, these four concepts are so powerful that I believe that they will shrink the entire IT economy. IT shrinking? How could that be possible? Yes, I think that the $3.3 trillion dollar global IT economy could be cut in half. When I’ve made this declaration before I’ve been likened to the commissioner of the US Patent Office who was rumored to have said:

“Everything that can be invented has been invented.”

Charles H. Duell, Commissioner, U.S. patent office, 1899 (attributed)

In truth he didn’t say this. http://en.wikipedia.org/wiki/Charles_H._Duell

But I’m still saying that I think we’re currently seeing the peak of complexity and cost in IT. IT is going to get easier and less expensive from this point forward. There. You have it in writing. (more…) «The Actual Truth About the Economics of Cloud Computing»

Measuring the Performance of Clouds – GoGrid

Tuesday, March 17th, 2009 by

Raditha Dissanayake posted a blog entry comparing Amazon EC2 and GoGrid performance. Unfortunately, we think Raditha did not use the most rigorous methodology possible for doing his comparison. It would be inappropriate for GoGrid to performance test Amazon’s EC2. In fact, their Customer Agreement may actually make such activity questionable, but IANAL (I Am Not A Lawyer).

Let’s take a more rigorous look at GoGrid disk subsystem performance.

Framing the Issue

As a start the entire issue is a LOT more complex than can potentially be covered here. Today’s disks, hard drive controllers, and operating systems have many different kinds of caching mechanisms. In addition, virtualization systems like Xen can impact results in unexpected ways. For example, did you know that Xen can be deployed in two major manners?

Either ‘paravirtualized’ or ‘hardware virtualized’. The two different models almost certainly impact any testing methodology. And yes, you guessed it, Amazon and GoGrid don’t configure Xen in the same way. Amazon uses paravirtualization and GoGrid uses hardware virtualization. Beyond this public information neither Amazon nor GoGrid provide significant details about their infrastructure considering it, rightfully so, proprietary intellectual property.

Without a deep understanding of all of the issues it’s difficult to do a test much less a proper comparison.

(more…) «Measuring the Performance of Clouds – GoGrid»

Trending Various Computing Terms – “Clouds” are getting Congested

Tuesday, June 10th, 2008 by

I spent some time analyzing search trends of different computing keywords to try to put everything in perspective. Google trends is a nice too that gives insight into broad search patterns.

Google_Trends_logo_sm

We all know that the term “Cloud Computing” is relatively new to the Technology buzz. But just how new is it? For starters, I ran a quick comparison of “Cloud Computing,” “Grid Computing” and “Utility Computing”.

trends_cloud_grid_utility

The term Grid Computing has been around for a while (even before Google Trends tracking shows it). But as you can see from the graphic above, it is trending downwards. Utility Computing has pretty much remained below the radar in comparison. But, the newcomer Cloud Computing, which made its full entrance into this trend analysis around 2007 is rapidly gaining momentum. 2008 seems to be a pivotal time where it surpassed Grid Computing (and continues to grow).

Cloud computing is relatively new as a server hosting term. People are starting to loosely associate it with traditional hosted server solutions. So to put this all in perspective as well as add some other “hot” keywords in to the mix, I trended the following:

  • Cloud computing
  • Grid computing
  • Dedicated server
  • Colocation
  • Virtualization

(more…) «Trending Various Computing Terms – “Clouds” are getting Congested»

GoGrid FAQs – Part 1

Friday, March 28th, 2008 by

It is pretty obvious that the interest is high with GoGrid. And to that end, you have plenty of questions. We have been listening and hope that this first set of answers will help you in choosing GoGrid as your next hosting solution.

General

Question: Do I have full root access to each machine I’m running?

Answer:
Yes. All Linux machines have “root” access. All Windows machines have “administrator” access.

Question: Do I have to add new machines manually?

Answer:
Yes. Currently all new machines must be added via the GoGrid web interface.

Question: Can I set up a rule to have my GoGrid server scale automatically with demand?

Answer:
Not currently. However this is a feature that is on the product roadmap.

(more…) «GoGrid FAQs – Part 1»