On Mon, January 12, 2015 11:00 am, Warren Young wrote:
On Jan 11, 2015, at 11:05 AM, Valeri Galtsev galtsev@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 youve 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 youre 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, Id 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@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 ++++++++++++++++++++++++++++++++++++++++