New-age Transactional Systems - Not Your Grandpa's OLTP
John Hugg discusses high volume transaction processing applications with high and low frequency profiles, and how VoltDB can be used for that purpose.
The content has been bookmarked!
There was an error bookmarking this content! Please retry.
Posted by Deborah Hartmann Preuss on Jul 03, 2006
"I understand your frustration. The "big fixed price project" situation happens in most large companies, and in many small and medium ones is not uncommon."Beedle went on to offer a series of suggestions in three categories:
"You certain can ... you can do the estimates the same way you would were you not doing Agile. I would imagine that that didn't work very well in the past, and that it would continue not to work very well in the future."Note that recently Mike Dwyer posted a useful link on this list to an article in Crosstalk, Journal of Defense Software Engineering., entitled "Lessons Learned Using Agile Methods on Large Defense Contracts" by Paul E. McMahon, Certified ScrumMaster (CSM).
Five Key Practices to Agile ALM
Agile Practices to Improve Project Management Organization (PMO) Effectiveness
Maximize your business-responsiveness with Mingle. Provide your global development team a shared space that adapts to the way they work.
In my opinion, if you are fix pricing, then you have to have other elements (the 4 pillars) of your project fluctuate/float (Project Management 101). And that is OK, as long as you do it in a structured, managed and Agile way.
My preferred approach is to make the scope float. When starting on the project we break down the requirements into User Stories that get prioritized and estimated in a full day workshop.
If you are going to estimate, you are going to start thinking solution. When we do this, we prioritize the solution as well (I call this horizontal prioritization). On the left of the prioritization is the simplest technical solution vs the right is the most complex "perfect world" technical solution.
Based on this work, we know that the project may be a "3 month project for 6 developers/testers". There is your cost right there! Now you go ahead and do what you can from the list of priorities in that time.
You are agreeing a baseline for your scope and you basically captured the must haves with the wish lists. Because the process is a collaborative one with your customer you are continually re-addressing this baseline scope (when you schedule work for the next sprint). So when you deliver a simple solution to a business problem, the customer has the power to re-prioritize the 'rolls-royce' solution ahead of another story after they have done their testing.
The customer gets their fixed price quote, and you get your Agile project.
John Hugg discusses high volume transaction processing applications with high and low frequency profiles, and how VoltDB can be used for that purpose.
Kevlin Henney examines code samples to see what can be learned from them starting from the premise that one won’t write great code unless he knows how to read it.
Jason Ayers share the observations he made watching a team of developers collaborating in real time on the same code base, pushing XP, pair programming and continuous integration to their extremes.
Michael Snoyman presents Yesod, a web framework written in Haskell and containing a web server, templating, ORM, libraries (templating, gravatar, etc.).
Richard Kreuter and Kyle Banker on how to avoid classical RDBMS transactional systems by using compensation mechanisms, transactional messaging or transactional procedures.
Attila Szegedi talks about performance tuning Java and Scala programs at Twitter: how to approach GC problems, the importance of asynchronous I/O, when to use MySQL/Cassandra/Redis, and much more.
One category of risk that project teams need to ensure they address is business value failure – delivering a product that fails to provide value for the business investor.
InfoQ spoke to the authors of Software Systems Architecture on a couple of new topics, the System Context viewpoint and Agile, which have been added to the second edition.
2 comments
Watch Thread Reply