Port slow-start mechanism – 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
•
At 21 seconds,the Brocade Virtual ADX allows a max-connection rate of 20 times the elapsed
time. The Brocade Virtual ADX increases the connections to 420 and from 22 seconds to 29
seconds, the Brocade Virtual ADX allows up to 20 new connections every second.
•
At 30 seconds, the maximum number of connections is reached.
The graph on the right shows how the maximum number of connections allowed for the real server
increases over the 30-second slow-start period.
lists the maximum number of connections a real server can have during each second of
the slow-start period.
When the slow-start period ends after 30 seconds, the maximum number of connections a real
server can have is determined by the max-conn setting for the real server and is one million
connections by default.
NOTE
When you disable and re-enable a real server, the Brocade Virtual ADX will go through the slow-start
mechanism for the server if it is not disabled. When you disable and re-enable a real-server port, the
Brocade Virtual ADX does not go through the port level slow-start mechanism.
Port slow-start mechanism
When individual TCP application ports on a real server are activated, they are allocated
connections using the port slow-start mechanism, which works differently from the server
slow-start mechanism described in the previous section.
TABLE 21
Maximum number of connections for a real server
Seconds after going online
Max. connections
Seconds after going online
Max. connections
1
10
16
160
2
20
17
170
3
30
18
180
4
40
19
190
5
50
20
200
6
60
21
420
7
70
22
440
8
80
23
460
9
90
24
480
10
100
25
500
11
110
26
520
12
120
27
540
13
130
28
560
14
140
29
580
15
150
30
Maximum