Funsize

Partial update service

What is Funsize

Funsize enables you (CI) to create partial MAR (Mozilla ARchive) update files and publish them to Mozilla Update Server (Balrog).

Current process

• Nightly/release build - generate complete MAR
• Identify previous build(s)
• Generate partial update
• Publish to Balrog
• Repeat for L10N repacks

Cons

• Nightly: limited to a single previous build
• L10N repacks: inline generation takes time
• Releases: have to specify the list of partials a week before release

Pros

It works!

Why Funsize

• UX: Smaller files to download
• Faster adoption of new versions
• Less network load
• Decoupled from builds

Architecture

• Scheduling: Pulse/AMQP based
• Execution: TaskCluster
  • Update generator
  • Signing
  • Publishing (S3, Balrog)

Reporting: Treeherder

Future plans

• ADI based updates
• Updates (almost) on-demand
• S3 diff cache

What's in a name?

Authors: Anhad (ffledgling), Mihai and Laura

• Small updates
• Mini MARs
• Mars Mini

Thanks!