In April, 2014 Linode rolled out a major infrastructure upgrade for their VPSes. When I saw that their update included SSDs (among other things) on all new instances, my mind instantly went to this dog-slow Tomcat application I currently have running in an Amazon EC2 m1.medium instance. I bought a shiny new Linode 2048 and […]
I use Monit to do lightweight monitoring and alerting for my services. Nothing advanced, just one host running monit which probes other servers via TCP, UDP, ICMP, etc to see if services are accessible. Monit can do much more if you install it on each machine itself, but I’m not interested in that right now […]
After nearly a year of running GlusterFS on my compute cluster, I’m surprised it took me so long to run into this bug. I rebooted one of my compute nodes and found that the machine hung at Mounting network filesystems during the boot sequence. From the volume log — /var/log/glusterfs/<volname>.log — on the client, it […]