How a Server is Selected
The main functionality of Equalizer is to load-balance-- that is that when a request is received
from a client an appropriate server for to connect the request with. The "appropriate" server is
usually selected as part of a proprietary load balancing algorithm or via round-robin. Another
factor in server selection is "persistence". If a client connection has persistence associated with it,
the server to which the persists should be selected for load balancing If the server selected by
persistence is not available, the appliance uses load balancing policy to select an alternate server.
Server Selection Process Flow
The figure below shows the server selection process. As describe above, this process depends on
whether persistence is in use. Once a server is selected, Equalizer verifies that it isn’t too busy
(based on
max_connections
) and that it has been probed up. Then Equalizer tries to connect to it.
The figure below shows the connection establishment and server failover mechanism.
Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
All Rights Reserved.
31
Equalizer Administration Guide
Summary of Contents for Equalizer GX Series
Page 18: ......
Page 32: ...Overview 32 Copyright 2014 Coyote Point Systems A Subsidiary of Fortinet Inc ...
Page 42: ......
Page 52: ......
Page 64: ......
Page 72: ......
Page 76: ......
Page 228: ......
Page 238: ......
Page 476: ......
Page 492: ......
Page 530: ......
Page 614: ......
Page 626: ......
Page 638: ......
Page 678: ......
Page 732: ...Using SNMP Traps 732 Copyright 2014 Coyote Point Systems A Subsidiary of Fortinet Inc ...
Page 754: ......
Page 790: ......
Page 804: ......
Page 842: ......
Page 866: ......