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Category Archives: tech
Mysqldump – Backup and Restore
October 20 11
Backup mysqldump -u devise -ppassword -h 127.0.0.1 database_name > backup.sql Restore mysql -u -ppassword database_name < backup.sql
Website scaling – no magic formula
September 8 11
Lately I’ve spoken to numerous entrepreneurs all keen to ensure that their new website can rapidly scale to cater for the massive amount of traffic that their brilliant idea will bring in. Thought I would write up a bit of advice from the trenches. Scaling is easy and incredibly difficult at the same time. Easy [...]
Upgrading to Lion server from OSX server 10.5.8
September 8 11
Unfortunately one cannot upgrade from OSX Server 10.5.x straight to Lion Server. There are two choices Upgrade to Snow Leopard Server (if you can find a copy & are prepared to shell out $400 or so. Then upgrade to Lion via the app store. Rebuild server as Snow Leopard workstation then upgrade to Lion server [...]
Devise and Cancan
August 2 11
Been using devise for a number of projects, happy with the authentication process. Cancan (thanks Ryan Bates) allows role based permission management. Once you understand how things work together, it’s quite easy to setup and test. Found these blog posts helpful. http://www.tonyamoyal.com/2010/07/28/rails-authentication-with-devise-and-cancan-customizing-devise-controllers/comment-page-1/#comments http://www.tonyamoyal.com/2010/09/29/rails-authentication-with-devise-and-cancan-part-2-restful-resources-for-administrators/ There are a few gaps though, that are filled in here. http://stackoverflow.com/questions/5739419/checkboxes-are-getting-but-not-putting-many-to-many-roles [...]
HTML5 sockets
July 30 11
Seems with html 5 websockets I can now think of the browser as a unix terminal. Instead of serving out flat html files, I can serve out one small bit of javascript that builds the page synchronously & interacts with the user. All good for very fast dynamic web pages, and a great user experience. [...]
Started coding Turtle trading routine
January 6 10
The Turtle Trading system as taught by Richard Dennis supposedly returns an 80% annualized return. Well.. that sounds interesting & worth testing. I’ve build a simple database of historical stock prices using yahoo finance. Let’s see how this goes. Update – July 2011: Could not get profitable backtesting so canned automated project. However profitable in real trading [...]
Alive again..
December 19 09
Moved to WordPress from a self-coded rails site. Still hosted at Dreamhost. Why? – use the best tool for the job. More to come..