basic concept:
Grayscale release (grayscale high volume): When a product is developed, it is first released to a small number of seed users using invitation codes and other means.
Rack size: the unit is u, one u is equal to 44.45 mm, common such as 1U (4.45cm high), 2U, 4U, 6U, 8U, etc.
Bandwidth cost:
Managed server: Users put their own equipment (switches, servers) in the computer room of a professional IDC service provider to enjoy professional services.
DNS load balancing: Allocate a domain name to multiple IPs and distribute traffic during DNS resolution.
BGP interworking (BGP computer room): It is the related network technology that server renters can use technical means to realize that different operators can jointly access one IP, and different operators can achieve the fastest access speed.
SSL handshake:
Application performance testing platform: https://report.tingyun.com/network/view/view
Linux kernel parameter optimization:
CISCO CCNA：
zabbix：
nagios：