sky, Author at Sky's Blog

Hosting- Rackspace on steroids and on to WPEngine (for some)

15 December, 2012 by sky Leave a Comment

Oh man, I am asked all the time how to pick a hosting company. And although I do all my hosting in just two places now, the evolution has been interesting, and I don’t have an answer that I completely like yet. I can see that for most people, you have to go with something easy, and the domain registrars provide easy solutions – like Network Solutions and GoDaddy, for instance. But if you’re a geek and can handle your own simple installations, then a virtual private server can be a tempting idea.

Here’s my history of hosting on the Internet. [Read more…]

Even Robots.txt won’t keep the googlebot away

6 November, 2012 by sky Leave a Comment

Well am I ever surprised! I would have thought that inserting a robots.txt file that tells googlebot to “go away” would cause it to “not index the site.”

User-agent: *
Disallow: /

Instead, I discovered that the googlebot may still spot the site and then put up a message saying that the site exists but is not indexed. i.e. the Googlebot still publicizes the existence of the site. It makes Google look like the good guys and us look like the bad guys for putting up a robots.txt. Yay for Google liberating all online information! Boo for us trying to keep our site un-indexed until we’re ready to make it public. [Read more…]

Space Shuttle Endeavour’s Last Flyover

21 September, 2012 by sky Leave a Comment

NASA flew the retired Space Shuttle Endeavour through the San Francisco Bay Area this morning. It was a treat for tens of thousands of us who waited and watched for this very last flight of the Endeavour. It is one of four shuttles going into retirement in the form of permanent exhibits…with Endeavour ending up in Los Angeles.

Using amateur radio repeaters — there were lots of folks watching for the aircraft all along its route — I tracked the flight’s progress from Southern California up past Stockton, where it flew around the capitol building in Sacramento twice, then down the Sacramento River to the Bay Area. The craft made a pass by the Golden Gate Bridge, one around the Bay in a big loop, and then back out straight between the bridge towers. I joined hundreds of enthusiastic fans viewing from Twin Peaks (elev. 800+ ft) in the geographical center of San Francisco. We were nearly the same elevation as the aircraft, which flew between 1,200 and 1,500 feet during the entire maneuver. [Read more…]

Mars Curiosity Inspires me to Explore more Radio Data Modes

6 August, 2012 by sky 1 Comment

This is a way geeky night for us engineers, and somewhat akin to the 1969 moon landing in many ways. I’m watching the Mars rover Curiosity landing right now (14 minutes delayed, of course, due to the speed of light). “Parachute deploy!” they say just now. And a minute or two later I’m watching as the JPL engineers report “Touchdown confirmed, we are safe on Mars … and … Now to see where Curiosity will take us.” The largest rover and science experiment to date has landed on Mars (afternoon Mars time, actually). By the time the radio signals reached us, the rover had been there for 14 minutes. (The photo is of a wheel cover, which I guess a mechanic is going to remove tomorrow.) Follow developments online at nasa.gov/msl

[Read more…]

Nginx may not improve your performance compared to Apache

4 August, 2012 by sky Leave a Comment

The predominant “web server software” used for WordPress sites are Apache and nginx. [1. tech discussion: Apache launches a new thread (a “program”) in server memory for every incoming page and object requested by your site visitors. This can rapidly clog the server’s memory as the number of requests per second increases. nginx initially launches a number of threads and then dispatches page/object requests to them for service—properly configured it doesn’t bloat up and fill memory.] Generally on smaller servers nginx will be more efficient because it doesn’t gobble memory like Apache does. The question of which web server software to use hinges primarily on the CPU power and memory resources that are required on the server side to make your site run properly. [Read more…]