Over Subscription vs Over Capacity – huh?
Jan 15th
Recently, a whole slew of tweets showed up across my feed dealing with the perceived and measured issues across multiple public cloud providers infrastructure.
Image via Wikipedia
One of the posts comes from Chris Hoff (this post in particular) that describes quite clearly what the differences are.
Service providers (anyone doing cloud services, virtualization, colocation, bandwidth, whatever) live upon the idea of over subscription. We make our revenue banking on the fact that not everyone needs their full allotment all the time.
With over subscription there is a chance of reaching a state of over capacity. Anyone using this business model needs to understand that they must be ready for it to happen. It isn’t an issue of ‘will’ but an issue of ‘when’. Good engineering can keep the ‘when’ at bay, virtually forever, and that is what you need to be prepared for.
Another recent posting via The Register (featuring @GeorgeReese) had some data dealing with network latency within the Amazon EC2 network. I don’t have any opinions about what was in this article, but it is something that is going to come up again and again as this new model of computing (for the masses) solidifies and grows up on the Internet.
Comments?
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How to re-blog?
Dec 5th
I am having a crisis. Nothing earth shattering…
I read different things sent to me via multiple avenues, from email to Twitter, and then I head off to read the actual content of those shortened URLs.
But how do I get that data to other people easily without cluttering up this blog? That’s my crisis and one I am trying to figure out.
I am a geek, I read geeky thing, though not all technical and not all necessarily SFW (if you don’t know what that means…whew).
So, how to do it without cluttering up what I hope to keep a clean and informative blog…that’s the problem I need to solve.
Comments welcome!
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VMware releases vSphere 4.0 Update 1
Nov 20th
The crowd cheers!
Though that might just be me :)
I am very excited for this update and I hope that it goes as smoothly as other updates have gone.
I have already updated 2 non-production systems (both ESX) and I am in the process of updating some non-production ESXi servers.
One of the items I need to schedule is the update of the vCenter software – this will require an actual outage for customers who are managing their VMs through ipHouse.
I hope that this update fixes 2 problems I have seen in the past (from the vSphere Client point of view):
- Inability for a datacenter administrator to view or clear host alerts and alarms from the hardware
- Interesting permissions issues that end up being more restrictive than the topic states
Both of these have been difficult to work around.
The first one requires the customer to contact us to ‘reset’ their hardware sensors.
The second one has actually hampered one customer from controlling their VMware cluster because of issues dealing with datastore management and the ability to attach an ISO image to their newly created VMs.
One item that is really exciting is the raising of the number of vCPUs (virtual CPUs) per physical CPU core to 25 per. Since we are able to sell VMware based virtual servers to customers, the ability to scale this higher could mean higher savings long term. Be nice to update pricing to reflect these savings later as well, though don’t know if there will be enough right now. At this point we really aren’t reaching the previous limit of 20 vCPU per pCPU.
Added support for Microsoft Windows Server 2008R2 is also welcome as we were wanting to deploy this version of Windows for customers.
Full release notes can be found here and are worth reading if you are into the enterprise products from VMware.
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- VMware boasts a half mil vSphere downloads (theregister.co.uk)
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Windows 7 creates blue screen for your heart
Oct 23rd
Oh it is a joke, don’t take it seriously, but look at what you get in Japan – the Windows 7 Whopper.
Can’t wait until Apple releases OS XI – but with garden burger patties…
Click the link to read all about it and watch the video…
FCC approves Net Neutrality Rules
Oct 23rd
You can find a ton of information all over, I’ll include links below for a few sites with commentary.
My comments are such…
I am VERY happy to see that something is going on to shake up the industry who seems hell bent on making the Internet not the Internet any further. The Internet is a collection of networks with data passing between them. It is not about having separate islands with explicit permission required to do X and Y or even to access Z. It is about cooperation and equality.
I am VERY sad to see that it is requiring government intervention to enforce a fair playing field for all networks and content/service providers. I’d have thought we were all adults, that pissing in the communal pool was considered bad form, that what is good for everyone is also good for business. I could be wrong.
I am not saying that these telecom companies need to give things away for free. I am not saying they should allow wonton abuse of their networks (based on reasonable definitions of abuse). I am saying that if I wish to use Skype (referenced in multiple articles) to call my friend, that I should be able to use Skype to call my friend. If I wish to use BitTorrent (the protocol, though I did the caps to give homage to the company) to move legal data around, I should be able to do so unhindered. If i want to watch television over the Comcast cable Internet network from NetFlix, then please, stay out of my way and don’t impose restrictions because you (Comcast) sell television service. (and let’s reference my old article on Comcast and the arbitrary byte caps)
Cheers FCC, sorry you had to be involved, hopefully once things are playing well you can remove your fingers and we people (businesses and consumers) can play in the park without supervision.
Boo on telecom companies who think they should control what I can and can not do or try to tell me what I can and can not access over my devices.
And the promised links:
- Wired: FCC Approves Net Neutrality Rules, Now the Fight Begins
- FOXNews.com: FCC Approves Proposed Net Neutrality Rules
- seattlepi.com blog: FCC approves net neutrality rules
- San Francisco Chronicle: FCC approves draft net-neutrality rules
My google query is here.
