Archive for April, 2009

The future of HA (High Availability)

Thursday, April 30th, 2009

For years we have moved to more powerful more expensive processor and SAN based systems in the goal to get to a more reliable system. We cluster machines together, use proprietary time slicing software to perform backups for each HA system. However it seems we are almost at a point where we are going to collapse back to the simple world again (again we probably have to thank Google and Amazon for this!).

I suspect in the near future gone are the days of setting up expensive OS (Windows or otherwise) clusters, and move in dedicated cluster appliances. Each running a set of host ‘machines’ that can ‘transparently’ fail over. It seems that as hard as the various OS vendors have tried, it appears the VM approach seems to have won over the fickle IT crowd.

As we would expect it wasn’t necessarily the technical skills that wows the crowds, but really the $. Enterprise versions of the various OS’s often cost more in licenses and more to maintain. In addition they are more complicated than managing a single machine. So what is the downside of managing a highly available single machine?

Has anyone tried to image and restore a physical clustered machine? It certainly wasnt trivial when some friends of mine tried. VM’s are so nice and easy to deal with – “Need to add a drive? Ok then I’ll allocate one for you”.

Roll on Simplicity is what I say!

Gareth

MS Releases IIS7 inline rewriter AJAX profiler

Thursday, April 30th, 2009

Seems like performance and tweaking HTML is on Microsoft’s mind at the moment. They just released a new AJAX performance tool, really a AJAX re-writer that requires IIS7.

http://blogs.msdn.com/somasegar/archive/2009/04/29/vs2008-ajax-profiling-extensions.aspx

Not tried it my self yet as it requires IIS7 (and I dont have any dev VM’s handy at the moment), but certainly looks interesting. This in conjunction with the pretty cool standard feature of IE8 Profiling (IE8 profiler. I have to say this unsung feature definitely rocks as part of the standard tools (yes I am very aware of FireBug :-) ), but as awesome as it is – it is a add-on. This is owned and controlled by the MS browser team, and shows that they are starting to act on what people have been telling them for years.

Definitely seems performance monitoring is a keen focus at the moment.

Gareth

New passive security ‘auditor’ released

Wednesday, April 29th, 2009

A new add-on for the Fiddler2 proxy enables passive monitoring/analysis of websites. Specifically this is handy for any pen analysis of sites under review for PCI audits. The add-on can be found at http://websecuritytool.codeplex.com/, and there is an excellent blog article covering its intent at http://blogs.msdn.com/sdl/archive/2009/04/16/watcher-a-new-web-security-testing-tool.aspx.

Hopefully this helps anyone looking for help performing some semi-automated test.

Gareth

More cloud articles

Wednesday, April 29th, 2009

It appears that there was a flurry of cloud stuff yesterday and today!

Google’s note on Cloud computing:

http://googleenterprise.blogspot.com/2009/04/what-we-talk-about-when-we-talk-about.html

ZDNet comments on ‘private clouds’:

http://blogs.zdnet.com/microsoft/?p=2610

These are interesting as the real benefit to this concept is that there is a consistent API that would allow applications running in a private cloud to be moved to a public cloud. Without this I don’t see how private clouds will really survive as a long term concept. Basically will the commercial cloud players try and make a stab at a uniform interface (or collection of interfaces)? If that happens the private cloud concept will live and prosper, otherwise it will take a couple of years to shake out the players until there is a defacto set of standards.

Finally The register has:

http://www.theregister.co.uk/2009/04/29/eucalyptus_goes_commerical/

This is where a newly born company (out of academia) is duplicating the Amazon Web Services (AWS) and enabling the private cloud concept. Pretty humorous amount of activity yesterday

Things are definitely hotting up under the clouds :-)

Gareth