Skip to main content

Infrastructure admin's dilemma: To do VM replication or to cluster?

Dan has some pointers:

Before such a decision can be made, it is very important to understand what are the organization’s goals. That is, what are they really trying to accomplish. Then the appropriate selection of products can follow. As the great sage, Yogi Berra once said, “If you don’t know where you’re going, you’ll end up somewhere else.”

Let’s us consider typical goals and see there it leads.

* Higher performance - In this scenario, the organization hopes to segment either the application or the underlying data allowing the work to be assigned to more machines. The desired result is reducing the time it takes for the work to be accomplished when compared to running the application on a single system. Quite often, a high performance computing/grid computing monitor is selected. While virtual machine software combined with the appropriate management software for virtualized environments and virtual machine replication technology could do the job, it is likely that the imposed overhead would result lower rather than higher performance.

Not only that, let me warn you, if you are a Virtualization Infrastructure consultant and have not worked with clustering solutions like openMosix, OSCAR Rocks, MPI etc and walk in to a heavy Linux/Unix/Windows environment, you might get your ass kicked by the Unix admins on this issues. And if you happen to run into a Oracle RAC DBA on your way out, you'd be humiliated royally! So my advice:

  • Exactly what Dan says, check out what the organizations goal is, and this can be a huge thing to discuss.
  • Check and do a pre-scan on the IT operations and applications stack: What can be clustered and what not
  • See which applications can tolerate some seconds downtime, VMotion / Live Migration can go pretty fast BUT we still need to see really mission critical OLTP applications in productions, think of an Oracle 10g database doing several hundred thousand transactions per day, some go even crazy at per hour!
  • Get the consensus from all ends, a CxO might have a different view than the IT OPS folks, I know its hard but you have to migle with the admins as well, never forget that!
  • And please check out what clustering si all about, not knowing what it is can be hard when people with intelligent arguments will play you down.
Eventually virtualization will be a layer no one will look at anymore and then all the attention is going to be on..yes, you guessed itv right..APPLICATIONS!!!. We all have kind of forgotten than lately doing all kinds of cool things with the virtualization software.

So as a consultant, you would want to bank on a long term strategy and not a hypervisor which might be irrelevant tomorrow!

Check it out.


Popular posts from this blog

DeepLearningTrucker Part 1

Avastu Blog is migrating to; 1st Jan 2009 live


I will send out emails personally to those who are using my link(s) on their sites.

Thanks much for your co-operation and hope you enjoy the new site and its cool new features :-)

Not like the site is unlive or something..on the contrary, its beginning to get a lot of attention already. Well most of the work is done, you don't have to worry about anything though:

What won't change

Links/Referrals: I will be redirecting the links (all links which you may have cross-posted) to - so you don't have to do anything in all your posts and links. Although, I would urge however that you do change the permalinks, especially on your blogs etc yourselfThis blog is not going away anywhere but within a few months, I will consider discontinuing its usage. I won't obviously do …

Redhot Future Of IT Part I :Marketing yourself as IT professional

I had promised about the "RedHot IT Future Series" and so we discuss here how you should market yourself EFFECTIVELY as an IT professional in this new (and dangerous) web age! Web is the place where you're a hero today and villain tomorrow. While there are lots of professionals who are active on the web, not all are enjoying a good reputation as they got "personal" with others and got into a cockfight. The passive IT professional has nothing to lose but nothing to gain at all!

I know "marketing" might seem as a greasy term but the idea is to have the truth about you out there. You know you're a good person and your family knows that you're really smart person but the rest of the world doesn't!

So the question is how do I market myself on the web as a true "nouveau IT professional". A guy who companies will be tempted to pick up the phone as say "Hey, we wanna talk with you. Can you fly over to Palo Alto (or Guatemala or Johan…