6. WHATSAPP
• 465M monthly users
• 19B messages in & 40B out per day
• Small team (~10 on Erlang),
handle development and ops
• ~ 550 servers + standby gear
• > 11,000 cores
7. A YEAR AGO…
• I took the summer off….
• “Why Erlang?”
• Challenges of SOA
• Curious about Erlang.
• Learn a functional language again.