Resources

Resources/Things to read:

• http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/en/us/archive/gfs-sosp2003.pdf

Notes:

• Two face protocol - machine tells you "yes, I'm ready to turn off". In between the acceptance of the shutdown command and the actual shutdown command the machine's answer might have changed.
• Soft state - workers have some sort of heartbeat message. Piggy back state changes while packets are being sent.
• Redundancy - what happens when a master fails?
• As stateless as possible. How to transfer state over from one master to another.
• Assume every component will fail, strive for correctness.

Correctness > Efficiency.