It has been about two years since I have visited a specific rack closet, and took pictures. Several days ago I have visited the same rack closet, and took some new pictures. You can tell time went by 😉
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Performance tuning is a sort of art. You know what you expect to reach, and you somehow strive towards that through selective tuning. Either your OS memory utilization, your network settings, NFS mount parameters, etc. I’ve been to a customer who’s server acted funny. First, it had high load average – for an idle server…
Well, the results weren’t for the hang, but were for the long while since it was last rebooted. Usually it’s around 2+ month between reboots, my desktop, and it leaves you with tons of questions as to what might happen when you actually boot up. Well, it never happens when you want it, or have…
A while ago, a newer version of Cacti became available through Dag’s RPM repository. An upgrade went without any special events, and was nothing to write home about. A failure in one of my customer’s Cacti system lead me to test the system using “spine” – the “cactid” new generation. I felt as if it…
My new Linux server-to-be will require some remote monitoring and process keepalive going there. It’s that I’ve noticed nscd (which is required, when dealing with hundreds of LDAP based accounts) tends todie once a while. I’ve also made a mistake once, and managed to kill all SSH daemons, including the running ones. I am happy…
After upgrading my laptop to 2.6.15.1 kernel, hibernation worked flawlessly. Running my previous version of kernel – 2.6.14.2, I have had some hibernation instabilities. I’ve had some memory corruptions here and there, which would have required I reboot the machine. So far, and it’s been a while, I’m glad to say I had no reason…
It’s sort of a relationship between myself and this Tyan. Same server, changing demands. This time, we’ve had to install on this server RHEL4 32bit. Net-installing RHEL4 Update 3 was impossible. See here, so we’ve installed it from CDs (didn’t have PCI-X network card handy). When booting the server, it showed us only a single…
