Question: One can read on various sources (http://www.omgubuntu.co.uk/2015/04/linux-kernel-4-0-new-features) that the new kernel allows updating of the kernel without a reboot.
For the unwashed masses, including me, what does this mean for Debian and our towo kernels?
THANKS!
well, Live Kernel Patching sounds interesting, but also completely useless for desktop usage.
The feature addresses high-availability servers with lots of users, only to avoid downtimes of minutes. E.g. with 99,99% service availability you are permitted to have 52 minutes of downtime per year and that could be one reboot per month with less than five minutes duration each.
On the other hand to assure this availability you will need clustered datacenters with double-redundant high-speed connections (e.g for clustering the cabinets of a distributed storage area network (SAN) with 4 GBit connections over optical fibre you can reach about 6-7 km distance for your sites to possibly resist an aircraft crash on one of your datacenters. For this unlikely event you even pay the wages for a second team of operators and you don't have both teams working at the same building).
Long story short: I'm sure nobody would use Debian unstable in this service level class.
So, let's happily drop the feature and save towo`s valueable manpower for more useful development goals.
greetings
musca
Quote from: musca on 2015/05/13, 00:37:15
Long story short: I'm sure nobody would use Debian unstable in this service level class.
So, let's happily drop the feature and save towo`s valuable manpower for more useful development goals.
Gute antwort, Danke!
Good answer, thank you!
Hallo dibl,
das Kernel Live Patching ist vor allem für die Administratoren von Rechenzentren wichtig, die nur eine minimale Downtime pro Jahr erlauben (aufgrund von Serviceverträgen). Wie musca schon geschrieben hat ist das Feature für ein Desktopsystem kaum relevant. Ich glaube (bin mir aber nicht ganz sicher) das diese Funktionalität von RedHat entwickelte wurde.
--- translated by Goggle ---
the kernel Live patching is especially important for data center administrators that only a minimal downtime per year permit (under service contracts). How musca already wrote the feature for a desktop system is hardly relevant. I think (but am not sure) that was this functionality developed by RedHat.