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Yesterday evening, I walked two miles along the seafront at Carrickfergus and back. Just a dozen miles from the city of Belfast, this is a surprising gem with fishing boats, old quaysides, and a magnificent castle. With so many pictures, made sparkling by gorgeous weather, I didn't know w ....

2204 - Images in a database? How big is a database? (MySQL)

The discussion came up yesterday as to whether images should be stored in plain files or in a database, with one of my delegates saying that he had been strongly advised against a database. That advise is typically going to be correct for a handful of images ... but when you get on to thousands in ....

2203 - Always use su with minus. And where do programs come from?

When you're using the su command to do systems admin work as route, you should always add the - options (minus sign on its own) to start a new root environment too. This means that the PATH that executable files are found from is replaced (amongst other things) - so you can find things like ifconf ....

2202 - Bright Colours

I was struck by the brightenss of colours this early evening in Whitehead and Carrickfergus - I'm going to let the pictures speak for themselves. But let's not forget the brightness of natural colours too - the vibrant greens taken on Island Magee, just a few minutes earlier, nor the power of bl ....

2201 - Running straight from the jar, but not from a tar

Why can you run applications in Java straight from the jar, but you'll never find mainstream applications extracting their code from a tar file? It all comes down to the different indexing structure. A tar file was originally designed as a "tape archive". So it's a sequential file that contains f ....

2200 - England, Scotland, Northern Ireland

Yesterday I travelled from Melksham to Northern Ireland - a course to give this week. And with equipment to bring, I came on the ferry. Plenty of routes to choose, and I chose to drive up through England (picture is taken at Tebay in the Lake District) and the on through Galloway. With boats bei ....

2199 - Improving the structure of your early PHP programs

When you first coded in PHP, you probably wrote a different script to handle each form in a series - it's the natural way when you're early in the learning process, but it can lead to repeated code that's hard to follow, and some really horrid complicated conditionals. On Saturday and Sunday, I dem ....

2198 - On the road, at a Service area thats a cut above the others

I (and everyone else) are much more prone to post <rant> than <praise> ... so here for a change is one of the latter. An early start this morning - 04:45 from home - and a stop at 09:00 on the motorway north at Tebay. Breakfast, email check, and I'll be carrying on in a few minutes. As s ....

2196 - New Example - cacheing results in PHP for faster loading

Here's an example from the last couple of days which is fully my own work, so I can share! I was analysing a big data flow - yesterday's web log file in this case - and it was rather harsh on the server. No big shock about that - the log file's around 40Mbytes per day and I didn't have it in anythi ....

2195 - A two day gap - first time in five years?

A very busy few days (if you wonder why it's the first time in five years that I have gone two days without posting here!). Friday was last minute preparations for a very important rail meeting in Swindon - senior level, lots of important players. That's yet to be written up and I've got to repo ....

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