Turtles all the way down – Thin LVM + KVM tips and Tricks – Steven Ellis
- ssd -> partition -> encryption -> LVM -> [..] -> filesystem
- Lots of examples see the online Slides
- https://github.com/steven-ellis/ansible-playpen
Samba and the road to 100,000 user – Andrew Bartlett
- Release cycle is every 6 months
- Samba 4.0 is 4 years p;d
- 4.2 and older are out of security support by Samba team (support by distros sometimes)
- Much faster adding users to AD DC. 55k users added in 50 minutes
- Performance issues, not bugs, are now the biggest area of work
- Customer deploying SAMBA at scale
- Looking for Volunteers running AD will to run a tshark script
- What does your busy hour look like?
- What is the pattern of requests?
The School for Sysadmins Who Can’t Timesync Good and Wanna Learn To Do Other Stuff Good Too – Paul Gear
- Aim is 1-10ms accuracy
- Using Standard Linux reference distribution etc
- Why care
- Same apps need time sync
- Log matching
- Network Time Foundation needs support
- NTP
- Not widely understood
- Unglamorous
- Daunting documentation
- old protocol, chequered secrity history
- The first Google result may not be accurate
- Set clock
- step – jump clock to new time
- slew – gradually adjust the time
- NTP Assumption
- The is one true time – UTC
- Nobody really has it
- bad time servers may be present
- networks change
I ran out of power on my laptop at this point so not many more notes. Paul gave a very good set of recommendations and myth-busting for those running NTP though. His notes will be online on the Sysadmin Miniconf site and he has also posted more detail online.
