Urban Landscape

Took some photos on the street of NYC and mostly of the Pep Boys in Jersey City that’s about to be demolished and is currently a canvas.

MySQL To Percona Server Gottcha

Decided to replace the aging MySQL 5.1.x on a CentOS Box with a newer Percona Server 5.6. First step was to update MySQL 5.1 to 5.5. This went relatively smoothly after I figured out some mySQL transaction kung-fu and ran mysql_upgrade. Step two was to replace it with Percona Server. It installed fine. Almost to simple. So naturally I ran:

etc/init.d/mysql start

which resulted in a dreaded:

Starting MySQL (Percona Server).... ERROR! The server quit without updating PID file (/var/lib/mysql/SERVERNAME.pid)

After a few minutes of pouring through the logs I noticed this little nugget:

2015-04-25 19:18:16 18234 [ERROR] /usr/sbin/mysqld: unknown variable 'table_cache=7K'

Apparently around MySQL 5.1.3 they replaced table_cache with table_open_cache. A simple rename in my.ini, and we’re on our way. Now running a little faster thanks to some much newer DB binaries.

AeroFarms Using Technology To Grow Food

There’s been a fair amount of research in the past few years about more scalable and environmentally friendly ways to grow food. AeroFarms is embarking on an ambitious plan to put some of technology to work with a Newark, NJ based farm in an old factory.

The basic idea is using technology like energy efficient LED lighting, carefully monitored watering and nutrition by using a mist (vs planting in soil). Space is optimized by stacking them similar to servers in a data center. The end result is you can grow edible plants in a very fast, efficient, predictable way. No more weather ruining crops, thousands of acres of land devoted to farming.

Just imagine if one day this could get deployed to places like Africa. Efficient solar powered farming could change how Africa does food. It could become much more practical to farm in desert places.

F-35 Augmented Reality Helmet

F35 Helmet

The F-35 helmet is one of the most impressive things you’ll see technology wise this year. It will take a long while, but eventually augmented reality will get better, more compact, and cheaper until it will his the civilian market. No more “blind spots” in a car. No more being unable to see the obstruction in front of the large truck ahead of you. I think there’s a good chance we’ll see this hit the market before we’ll see self driving cars prolific enough to remove the “driver”.