Letsgetdugg

Random tech jargon

I needed something like zfs-auto-snapshot written by Tim Foster but portable so it works on all systems that support ZFS. I reviewed a few scripts on github and was unhappy with what was out there so I decided to write my own. With zbackup.rb you can define what to snapshot and how many rotation days […]

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I hate expired sessions, death to all expired sessions. Traditionally a Java servlet container has a fixed session time, a flood of traffic can potentially cause JVM OOM errors if the session time is set too high. I wanted a smart session container that can hold onto sessions for as long as possible and expire […]

I’ll start this post off with a quote from IRC ivaynberg: you cant build good looking sites with wicket victori: lies ivaynberg: or public-facing sites I have to admit that Wicket appeals more to the “backend” programmer than to the front-end design conscious developer. For every good-looking Wicket site out there, there are ten abysmal […]

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Update: I feel like a jackass now, I thought I was running this against the stable haproxy build, but in reality this was against haproxy-1.4dev6. DOH! Well on the bright-side, I am helping out the author fix a potentially critical bug. Here is the truss and tcp dump if anyone cares. Well yet another Solaris […]

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I used to backup our database using the following statement; pg_dump -h fab2 -Fc -Z9 somedb > somedb.db Once our dataset grew into the gigabytes, it took a very long time to do database dumps. Today, I stumbled upon yet another awesome blog post done by Ted Dzibua mentioning two useful parallel compression utilities. So […]

I just pushed up a new version of Satan to GitHub. For the uniformed uninformed Satan is my process reaper for run away unix processes. Satan was designed to work with Solaris’ SMF self-healing properties. Basically, Satan kills while SMF revives. The new version that was pushed up contains HTTP health checks, so Satan now […]

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Ted Dziuba beautifully articulated why deadlines go to crap and seemingly straight forward tasks go out the window. You sir have done a public service for us all, thank you. What I hate is fording endless rivers of horseshit that are in the way of seemingly simple tasks. And I hate it even more when […]

I needed a thread-safe JSMin library for compressing javascripts on the fly on UploadBooth, so I took an existing ruby implementation and made it thread safe. I don’t think there was license defined when I got it, so I am re-releasing it as-is. require ‘monitor’ class JSMin   EOF = –1   include MonitorMixin   […]

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Since Varnish did not work out on Solaris yet again. I have decided to bite the bullet and write a headers normalization patch for Squid 2.7. This patch should produce much better cache hit rates with Squid. Efficiency++ What the patch does: 1. Removes Cache-Control request headers, don’t let clients by-pass cache if it is […]

Clearing stale cache by domain You can clear a site’s cache by domain, this is really nifty if you have Varnish in front of multiple sites. You can log into Varnish’s administration console via telnet and execute the following purge command to wipe out the undesired cache. purge req.http.host ~ letsgetdugg.com Monitor Response codes Worried […]

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