Archive for July, 2010

UNIX IPC tutorial in C

Brian Hall, “Beej” wrote a cool tutorial explaining all the different aspects of traditional UNIX Inter Process Communication (IPC). He provides a lot of C code where you can compile / test these concepts yourself for a better understanding. The high level concepts in this tutorial would be great material to use in conducting technical […]

Wiping a hard drive with preclear_disk.sh

I recently picked up a couple of Seagate 1.5TB hard drives, and based on the reviews I wanted to conduct an EXTENSIVE burn on each drive (a number of people have reported these drives suffered from the “click of death”). There are various tools to read and write data to a drive, but the most […]

My 1000th blog post

Wow, I can’t believe 999 blog entries have been posted to the prefetch blog! This blog started all the way back in October of 2004, and was a way for me to document technology as I learned it. I never thought people would actually read it, and am even more amazed that this site now […]

Configuring a caching only DNS server on Solaris hosts

While investigating a performance issue a few weeks back, I noticed that a couple of our Solaris hosts were sending 10s of thousands of DNS requests to our authoritative DNS servers. Since the application was broken and unable to cache DNS records, I decided to configure a local caching only DNS server to reduce load […]

The state of OpenSolaris

Matty and I haven’t really spoken much about the current state of the OpenSolaris project. Oracle has been pretty tight with releasing any type of information about their plans / directions in which they will be taking Solaris / OpenSolaris. Its caused a lot fusteration. The OpenSolaris Governing Board threw down the gauntlet and has […]

Locating physical disk drives in Solaris

On “enterprise” Sun hardware, you can do nifty tricks like blink LED lights on disks to identify where logical disk names like c8t2d0 resides as Matty pointed out in the blog post here. But what if you’re stuck on crufty (cheaper) regular SATA drives without the sexy LED support? How do you find c8t2d0 amongst […]

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