[Blueprint servercloud-r-swiftmirrorsnapshots] Create Ubuntu Archive Snapshots swift-mirror

[Dave Walker]

Blueprint changed by Dave Walker:

Whiteboard changed:
+ # FEEDBACK
+ Discussed with xnox, this is making good progress.
+ 
  see also: https://blueprints.launchpad.net/ubuntu/+spec/bibisect
  User Stories:
  Colin is pinged about a horrible and nasty bug in the installer. After performing a binary bisection across the whole archive over the past month, he narrows it down to a small amount of uploads. After testing images with binaries from those uploads, the bug is pin-pointed and fixed.
  
  CD/cloud images are build from a snapshot, instead of having their own
  mirror.
  
  Risks:
  Wasted bandwidth / disk-space.
  
  Test Plans:
  
  Release Note:
  
  Session Notes:
  How to do this?
  - expensive on the public cloud
  - potentially a lot of storage (i386, amd64 ~ 1TB during quantal)
  - preserve signatures
  
  - Ideally we want daily granularity for the tradeoffs
  - as well as taking manual snapshots
  - useful for cdimage building (actually a local mirror is already doing this for ISOs)
  
  - this is pilot, test it for one cycle (due to resource constraints)
  - keep a month at a time.....
  
  - dbg symbols is a use-case (well, it is currently stored in a separate
  archive with
  
  - backup to launchpadlibrarian (use a smart-proxy as a fallback to
  launchpadlibrarian)
  
  - useful for full archive binary bisect
  
  - avoiding cloud image and iso image skew
  
  Workitems:
  - use cases, costs, stake holders, solutions
  - how much data does it grow?
  - how is snapshot.debian.org is created?
  
  see also http://summit.ubuntu.com/uds-r/meeting/21105/bibisect/

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Create Ubuntu Archive Snapshots swift-mirror
https://blueprints.launchpad.net/ubuntu/+spec/servercloud-r-swiftmirrorsnapshots