Maintenance Completed

    Everything should be up and running now.  Our web server is now 22% faster making it now faster than 97% of the Internet according to Pingdom, before it was faster than 94%.

     Many other services have been sped up as well but to a lesser degree.  Most of the shell servers are also 22% faster now.

     I hope things will be stable but it will take a couple of weeks to be sure.  When CPU speed is increased, the voltage also needs to be increased.  No chart or other guide as to how much is provided but the rule of thumb is the absolute minimum necessary for stability at a given clock speed since heat is very directly related to voltage.  I ran stress tests for an hour, I’d really like to run them for weeks but can’t do so on in service machines.

 

Maintenance Outage

     I will be taking the server that hosts users home directories and a number of virtual machines down this evening in order to make some adjustments to the bios settings.  This will require multiple adjustments, boots, benchmarking and readjustments in order to achieve the maximum possible performance.  I will start this work around 11pm and it may take several hours to finish.

Server Upgrades Complete

     The server upgrades were challenging.  The actual upgrades went fine, it’s what newer versions of software broke that was problematic.  For example, nfs-kernel-server and nfs-common, those upgrades broke the NFS server’s ability to talk to eskimo.com which is a SunOS 4.1.4 machine although it worked fine with all, even very old, flavors of Linux.  So I backed out the upgrade for those two packages.

     Then the upgrade also upgraded php from 7.0 to 7.1, but many of our web applications are not yet compatible with 7.1, most notably squirrel mail.  So I had to uninstall 7.1, and add a third party repository to re-install 7.0.

     I believe everything is working but if you find something please generate a ticket, use Support->Ticket’s from https://www.eskimo.com/.  Since I was up until 7:30AM, I will not be available before around 2pm.

Ubuntu Mate 17.10

     I have upgraded my workstation and one mail server to Ubuntu 17.10 and the upgrades went more smoothly than any prior Ubuntu update I’ve ever done.  My ancient Nvidia graphics card that has always been a hassle to get to work properly required no tweaking at all, drivers worked out of the box, this is a first in five years!

 

Server Maintenance Finished

     I am done doing server maintenance for the night.  I kept Ubuntu down longer than expected in order to troubleshoot and fix an issue with the greeter.  I had to uninstall and reinstall a lot of things to get it fixed.  Hopefully did not break something else in the process.

Server Reboots

     I will be rebooting the host machines (which in turn will reboot all the servers) to load a new kernel that fixes some issue with UDP offloading on the ethernet port that was introduced with the last kernel upgrade.  Outages should be brief (approx 10 minutes each machine).