PHP 應用程式效能最佳化中的負載平衡方法

// 使用 Swoole 扩展实现加权轮询
use Swoole\Coroutine\Client;

$servers = [
    '127.0.0.1:9501' => 3,
    '127.0.0.1:9502' => 2,
    '127.0.0.1:9503' => 1,
];

$client = new Client(SWOOLE_SOCK_TCP);
$client->set([
    'open_length_check' => true,
    'package_length_type' => 'N',
    'package_length_offset' => 0,
    'package_body_offset' => 4,
    'connect_timeout' => 1,
    'timeout' => 1,
]);

while (1) {
    $targetServer = $servers[array_rand($servers)];
    $client->connect($targetServer, 0.5);
    $client->send('Hello from client!');
    $result = $client->recv();
    echo $result;
    $client->close();
}

// 使用 PHP GeoIP 扩展实现 DNS 轮询
use GeoIp2\Database\Reader;

$dbPath = '/path/to/GeoIP.dat';
$reader = new Reader($dbPath);

// 获取客户端 IP 地址
$ip = $_SERVER['REMOTE_ADDR'];
// 根据 IP 地址获取位置信息
$location = $reader->city($ip);
// 根据位置信息选择最优服务器
$targetServer = '127.0.0.1:9501'; // 默认服务器
if ($location['country_code'] == 'US') {
    $targetServer = '127.0.0.1:9502'; // 美国服务器
}