On Mon, January 12, 2015 11:00 am, Warren Young wrote: > On Jan 11, 2015, at 11:05 AM, Valeri Galtsev <galtsev at kicp.uchicago.edu> > wrote: > >> On Sun, January 11, 2015 11:22 am, Sven Kieske wrote: >>> >>> On 11.01.2015 03:42, James B. Byrne wrote: >>>> What does systemd buy the enterprise that sysinit did not provide? >>>> >>> systemd has it's ugly downsides, but it >>> _does_ provide much needed features. >> >> I don't care that _laptop_ with systemd starts 3 >> times faster - it's brilliant when you have to start it right on the >> podium few seconds before giving your presentation. > > What about all those poor enterprise people who have been arm-twisted into > agreeing to SLAs? > > If you’ve agreed to provide five nines of availability, a single reboot in > the old BIOS + hardware RAID + SysV init world could eat most of the ~5 > minutes of downtime per year you’re allowed under that agreement. EFI + > software-defined disk arrays + systemd might cut that to a minute, > allowing several reboots per year. Oh, boy, I like this! Do we finally converge on not rebooting machines often?! Valeri > > Until we start to see hot-upgradable Linux kernels in mainstream > distributions, I’d say that does amount to an “enterprise” feature. > > You can extend this argument to four-nines, where you only get 4 minutes > of downtime per month. Looking through the centos-announce list archive, > there seems to be roughly one kernel-* RPM change per month. Do you > really want to burn your entire downtime allowance on that? > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++