2 Web Servers & 2 Gateway Server on Two Machine / 4 Application Servers & 2 Gateway Servers on 4
We are considering the following architectures:
1) Have 2 Siebel Web Servers with Siebel Gateway (They all have the same virtual IP), where before them lays a Load Balancer. The Load Balancer is used to balance the traffic on the Web Services, as well as routing the SISNAPI requests to one of the two gateways - which will also load blanace requests to 2 Application Servers (Siebel Load Balancer).
LB
2 WEB SERVER & GATEWAY
2 Application Servers
2) Have 2 Siebel Web Servers, where before them lays a Load Balancer. Have two gateway servers, with Application Server installation on each of them (They both have the same virtual IP). The Gateway service will be started only on on of the two, no clustering will be used - instead, as been describe in #1, the load balancer (used before the web servers) will route the SISNAPI requests to the active Gateway Server. In addition, there will be 2 Application Servers. With this solution, we will benefit of splitting the load over 4 Application Servers.