The main advantages of the cluster system are:
High scalability:
High availability: One node in a cluster fails, and its tasks can be passed to other nodes. Can effectively prevent single point of failure.
High performance: Load Balancing clusters allow the system to access more users at the same time.
Cost-Effective: high-performance systems can be constructed with inexpensive, industry-standard hardware
Cluster Type:
The three most common types of clusters:
Load Balancer cluster: LB (Load Balancing)
Hardware load Balancing (Hardware): 1, F5,big IP 2, Citrix,netscaler 3, A10
Software load Balancing (software): 1, four-layer device LVS
2, seven layer equipment: Reverse proxy
Nginx (Http,smtp,pop3,imap) haproxy (http,tcp (MYSQL,SMTP))
High Availability cluster: HA (Hi availability)
High performance is also called Scientific cluster: HP (higher performance)
Lvs:linux Virtual Server (four-tier routing device)
Type:
NAT: Address Translation type
DR: Direct Routing
TUN: Tunnel
This article is from the "Learn Linux history" blog, please be sure to keep this source http://woyaoxuelinux.blog.51cto.com/5663865/1937479
Linux command: One of the Linux cluster---LVS type (not finished)