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…
As an administrator, I am responsible for many setups and configurations, sometimes hand tailored to supply an answer to a set of given demands. As a human, I err, and the common method of verifying that you have avoided error is by answering this simple rule: “Does it work after these changes?” In the world…
Modern Linux LVM offers great abilities to maintain snapshots of existing logical volumes. Unlike NetApp “Write Anywhere File Layout” (WAFL), Linux LVM uses “Copy-on-Write” (COW) to allow snapshots. The process, in general, can be described in this pdf document. I have issues several small tests, just to get real-life estimations of what is the actual…
