Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 384)

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Server Health Check Probes

# bind to the port, then listen on it

bind(SERVER, $paddr) or die "bind: $!";

listen(SERVER, SOMAXCONN) or die "listen: $!";

print "Server agent started on port $port\n";

# accepting a connection

my $client_addr;

while ($client_addr = accept(CLIENT, SERVER)) {

# find out who connected

my ($client_port, $client_ip) = sockaddr_in($client_addr);

my $client_ipnum = inet_ntoa($client_ip);

# print who has connected -- this is for debugging only

print "Connection from: [$client_ipnum]\n";

# send the server agent response value

print CLIENT $response;

# close connection

close CLIENT;

}

Here is the output of the server program when it is started on the server:

$./serveragent.pl 50

Server agent started on port 1510

Connection from: [10.0.0.32]

Another “Connection” line prints each time the server agent is probed by Equalizer.

From Equalizer’s perspective, all that is returned by the server agent is the integer set on the command line. For

example, if you use the example server agent above and set the response to “50”, here is what you will see if you

use the telnetcommand to open the server agent IP and port:

$telnet 10.0.0.120 1510

Connection to host lost.

VLB Health Check Probes

All Equalizers support basic load balancing of VMware servers through VMware vConsole integration. Equalizer

uses VMware's management API to retrieve real-time virtual server performance information from a VMware

vCenter console that manages virtual machines running on ESX Server (or from a single ESX Server directly). The

additional server availability and resource utilization information obtained from VMware allows Equalizer to more

efficiently direct the traffic flowing to VMware virtual machines.

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