Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) User Manual
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Brocade Virtual ADX Server Load Balancing Guide
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Miscellaneous health check settings
4
•
From 30 seconds to 40 seconds, the Brocade Virtual ADX allows up to 40 new connections
every second.
•
From 40 seconds to 50 seconds, the Brocade Virtual ADX allows up to 50 new connections
every second.
•
From 50 seconds to 60 seconds, the Brocade Virtual ADX allows up to 100 new connections
every second.
•
After 60 seconds, the connection flow control delivered by the slow-start mechanism ends, and
the Brocade Virtual ADX allows up to the maximum number of connections for the port on the
server. The maximum number of allowed connections for a real server is set by the max-conn
command; this maximum is one million connections by default.
The graph on the right shows how the maximum number of connections allowed for the port on the
real server increases over the slow-start period.
lists the maximum number of connections a port can have at 10-second intervals.
When the slow-start period ends after 60 seconds, the maximum number of connections that a
port on a real server can have is determined by the max-conn setting for the real server and is one
million connections by default.
Setting up a user-configured port slow-start mechanism
You can configure how quickly the Brocade Virtual ADX ramps up a particular port on a particular
real server by setting up a user-configured slow-start mechanism. Unlike the default port slow-start
mechanism, which applies to all ports on all real servers, a user-configured slow-start mechanism
is applied to a specific port on a specific real server.
A user-configured slow-start mechanism sets the rate at which the Brocade Virtual ADX allows
connections for a port over two configurable intervals (which comprise the slow-start period), along
with a limit for the total number of connections that the port on the real server can have during the
time the server is active.
Setting up a user-configured slow-start mechanism consists of the following two steps.
1. Setting up a slow-start list for a port
2. Applying the slow-start list to a port on a real server
Setting up a slow-start list for a port
To set up a slow-start list for port 80 (HTTP), enter commands such as the following.
Virtual ADX(config)#server port 80
Virtual ADX(config-port-80)#slow-start 101 10 30 20 30 600
Virtual ADX(config-port-80)#exit
TABLE 22
Maximum number of connections for a port
Seconds after port activated
Max. connections
10
110
20
310
30
610
40
1,010
50
1,510
60
2,510