- HTTP1/2 , Server push (style sheet, CSS , IMAGES reduce RTT-round trip time eventually boost performance)
- TCP/UDP (TCP-> SMTP , LDAP || UDP-> DNS , SYSLOG , RADIUS)
- gRPC
- FASTCGI
- MEMCACHED
- SCGI/UWCGI
- Weight=5
- backup
- down
- slow_start=30s
- max_conns
- queue 100 timeout=70
- Round robin (default)
- least_conn
- ip_hash
- Generic hash $request_uri consistent
- least_time
- header
- last_byte
- last_byte inflight
- random two least_time=last_byte
- Sticky cookie
- Sticky route
- Sticky learn (most sophisticated server side cookie, not at client side)