'Had a potential GlusterFS user state that the filesystem incorrectly reported that a write succeeded even though all the servers were powered off. Since this sounded rather impossible, I asked for details and duplicated the problem. This is the php code:' [Read more...]
Yesterday, in the middle of our business day, we suddenly could not run credit cards from our corporate office. The response code we received back indicated a bad terminal id associated with our merchant account. [Read more...]
So I set my puppet script to install beaver on a set of machines and feed the system logs to logstash. Now some of them have fairly infrequent log entries so I just wanted to get a list of all the loghosts in logstash. [Read more...]
In mixed results, some users have been reporting issues with mounting GlusterFS volumes at boot time. I spun up a VM at Rackspace to see what I could see. [Read more...]
So what makes replication hard? Your friends want you all to share a single list to see if, as a group, you can try every micro-brew on both continents. How do replicated filesystems handle this? [Read more...]
In a distributed hash table lookup, like that used by GlusterFS, misses are expensive. Let's look at how it works and why misses are "bad". [Read more...]
The Cascadia IT Conference is looking for sponsors and proposals for talks, tutorials and panels. [Read more...]
If you're in the Seattle area and would like to meet up and hear me talk about GlusterFS, come to the Seattle Area System Administrator's Guild meeting 7:00pm November 8th at the University of Washington (Bldg EE1, Rm 403). There will be dinner sponsored by Silicon Mechanics so even if I suck, it won't be a complete waste of time. [Read more...]
I'm happy to announce the availability of UFO Pilot, an HTML5 web app for accessing a Gluster UFO/OpenStack Swift object store from your Android or iOS mobile device. [Read more...]
Last month, I received two new servers to replace two of our three (replica 3) GlusterFS servers. My first inclination was to just down the server, move the hard drives into the new server, re-install the OS (moving from 32 bit to 64 bit), and voila, done deal. Probably would have been okay if I hadn't used a kickstart file that formatted all the drives. Oops. Since the drives were now blank, I decided to just put it in place, using the same gfid and let it self-heal everything back over. [Read more...]
