// Light At The End Of The Tunnel Light At The End Of The Tunnel

Light At The End Of The Tunnel

systems administration meanderings

Data capture with ExaNIC’s

Capturing the data My scenario is that I wish capture some multicast data and analyse it later. I’d like this process to be automated, start at a specific time, stop at a specific time, and then process the captured data file. I’ll be using CentOS 7 which is based on systemd. Fortunately, the ExaNIC cards come with a great utility called exanic-capture, this tool is one of the features of the ExaNIC card outlined in this post on the Exablaze site. Read more →

Configuring Exanic’s under CentOS 6

We use the Exablaze Exanic X4 cards at work. The manual does explain what you have to do but doesn’t give you the CentOS/RHEL specifics. I’m assuming the driver is already installed. The first thing to notice is that when the exanic.ko module is installed it creates the /dev/exanic0 device. The permissions on this driver crw-rw---- 1 root root 10, 58 Aug 27 21:46 /dev/exanic0 This is ok if your software runs as root. Read more →

CentOS 6.5 on Super Micro HFT server

Recently I had the chance to test the Super Micro 6027ax-72rf-hft3 server, which is meant for HFT environments, being over clocked including the supported network cards. I was aiming to run performance tests with the ExaNIC X2 from Exablaze. Unfortunately, the Super Micro website doesn’t list CentOS 6.5 as a supported operating system. My first couple of attempts in installing CentOS 6.5 on this server resulted in kernel panics, upon investigation I realised it was not seeing the disk controller. Read more →

Pebble watch

OK I got my Pebble Steel as a gift recently. I like it. I like the screen that I can read at anytime, twisting my wrist to turn on the back light is neat. I particularly like the ability to cancel calls from my watch, handy when you are at the barbers and your phone is in your pocket (I imagine useful for cinemas/theatres etc ….). I particularly like that Runkeeper and Strava send some of their details to the watch so you can have an easy view of duration, distance and pace. Read more →

Apple issues

No real surprises to my mate @gavincarr, but recently I’ve been having issues with the software Apple has recently released. The list is as follows:- * ios 6.1.3 on iphone 4S drains battery more quickly than previous versions. More details [here](http://www.techradar.com/au/news/phone-and-communications/mobile-phones/ios-6-1-3-battery-drain-fix-needed-for-iphone-owners-1141201) * ios 6.1.3 on ipad, browsing seems to be considerably slower, and app updates even get retry prompts - this is new, I know we have a slow internet connection but this is unusual. Read more →