Two years, one rack closet
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 😉
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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Air Conditioning is considered a complicated matter. Not that it is so mathematically, but measurements, except for the general notion of “hot”, “hotter”, “cold” and “colder” are rather complicated, and require tools which are not common with the maintainers of server rooms. We trust flow diagrams, and air flow schema, however, the outcome should be…
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…
ISPs which enforce QoS limitations suddenly, without alerting the customer, are abusing their force. QoS limitation is not a bad thing, from the ISP’s point of view, but changing the customer deal without notifying him seems to me to be unfair. This is a recipe for a QoS workaround. Ingredients: One fast Internet connection which…
I pause for a small unrelated island of happiness. I’ve bought PSP few month ago, and due to some issues with minor language bugs, I’ve upgraded its firmware, through its built-in interface, to a newer level. I had 1.50, and I’ve upgraded to 1.52. It was a major mistake. It seems there was (and still…
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…