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…
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 😉 This is the same rack, today
This post will offer several tips and tricks for wiring cables into new rack closets. It uses pictures as a demonstration of what to do and what not to do. It is based on a job I have taken part in with several other companies, moving the server farm to a new location. This job…
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…
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…
In my post just below, I have defined a set of tests to verify the possible cause of the tg3 problem. It had nothing to do with autoneg, and was fixed in RHEL 4 Update 4. That 32bit installer works correctly. One last thing to test – rebuild the installer initrd, and replace tg3 module…
