: Since unstable is always codenamed sid and experimental has no codename, they always roll. As a result, testing can be used as a desktop system without any big drawbacks. Any breaking bugs is a barrier for unstable to testing migration. Instead testing is always tried to be kept in a semi-rc state. Testing separates and whole cycle starts again. Then slows down (feature freeze) and stops (RC/Full freeze). It starts rolling slowly when a stable is released. You can manage these suites in two different modes: rolling (suite based) or non-rolling (codename based).Īs you also noted, testing has a sinusoidal rolling speed. There's oldoldstable but it's practically dead but, it's there. System in question was Itanium based IIRC.ĭebian comes in five suites actually: oldstable, stable, testing, unstable, experimental. It's no different for Debian but, RedHat was able to fly an engineer for NEC Corp. Since RedHat also has paid support, RH based distributions are considered more sound and mature, because if something breaks, RedHat can fix. I develop such software so, I know a little bit about the peculiarities. Its accuracy and precision sometimes depend on the mood of a newborn butterfly in Zanzibar. Scientific software is a very different beast. Or, it works without hiccup but, developers can't provide support since they didn't test on Debian. Possibly something would be hardcoded and you need to work around or re-compile it. Library versions present in RedHat and CentOS are used in development. Software certification done on RedHat and CentOS (compile / verification). It's more like people develop and verify on RedHat based distros (because ScientificLinux was RedHat based).
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