孟加拉国访问国内服务器慢，应用加速？？？解决方案//世耕通信全球办公专网

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# 内核参数优化echo "net.ipv4.tcp_sack = 1" >> /etc/sysctl.confecho "net.ipv4.tcp_window_scaling = 1" >> /etc/sysctl.confecho "net.ipv4.tcp_tw_reuse = 1" >> /etc/sysctl.confecho "net.ipv4.tcp_slow_start_after_idle = 0" >> /etc/sysctl.conf# BBR拥塞控制echo "net.core.default_qdisc = fq" >> /etc/sysctl.confecho "net.ipv4.tcp_congestion_control = bbr" >> /etc/sysctl.confsysctl -p

-- 查询缓存配置SET GLOBAL query_cache_size = 268435456;SET GLOBAL query_cache_type = ON;-- 连接池调优SET GLOBAL thread_pool_size = 32;SET GLOBAL max_connections = 500;-- 跨境从库设置CHANGE MASTER TO
  MASTER_HOST='gz-db-replica.aliyun.com',
  MASTER_SSL=1,
  MASTER_SSL_CA='/etc/mysql/ca-cert.pem',
  MASTER_HEARTBEAT_PERIOD=60;

http {
    # 启用brotli压缩
    brotli on;
    brotli_types text/plain text/css application/json application/javascript;

    # 调整缓冲策略
    proxy_buffers 16 32k;
    proxy_buffer_size 64k;
    proxy_busy_buffers_size 128k;

    # 跨境连接参数
    proxy_connect_timeout 60;
    proxy_send_timeout 300;
    proxy_read_timeout 300;
    
    # 静态资源CDN配置
    location ~* \.(jpg|png|css|js)$ {
        expires 365d;
        add_header Cache-Control "public";
        proxy_pass https://cdn.yourdomain.com;
    }}

val client = OkHttpClient.Builder()
    .protocols(listOf(Protocol.HTTP_2, Protocol.HTTP_1_1))
    .connectionSpecs(listOf(
        ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
            .tlsVersions(TlsVersion.TLS_1_3)
            .cipherSuites(*OrderedCipherSuite.ALL_MODERN.toTypedArray())
            .build()
    ))
    .pingInterval(20, TimeUnit.SECONDS) // 保持连接活跃
    .retryOnConnectionFailure(true)
    .addInterceptor(GzipRequestInterceptor())
    .build()

let config = URLSessionConfiguration.ephemeral
config.multipathServiceType = .handover
config.tlsMinimumSupportedProtocolVersion = .tlsProtocol12
config.httpMaximumConnectionsPerHost = 6config.requestCachePolicy = .reloadIgnoringLocalCacheData
config.timeoutIntervalForRequest = 30config.timeoutIntervalForResource = 300let session = URLSession(configuration: config)

# prometheus.yml 配置示例scrape_configs:
  - job_name: 'bangladesh_network'
    metrics_path: '/probe'
    params:
      module: [http_2xx]
    static_configs:
      - targets:
        - 'http://gz-app.example.com/api/health'
        - 'http://bd-edge.example.com/ping'
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target      - source_labels: [__param_target]
        target_label: instance      - target_label: __address__        replacement: blackbox-exporter:9115

import speedtestimport requestsfrom ping3 import pingdef check_network():
    # 基础连通性测试
    china_server = 'your.server.ip'
    if ping(china_server, timeout=5) is None:
        switch_to_backup_path()
    
    # 带宽质量检测
    st = speedtest.Speedtest()
    st.get_best_server()
    if st.download() < 5000000:  # <5Mbps
        optimize_qos_settings()def switch_to_backup_path():
    # 调用SD-WAN API切换路径
    requests.post('https://sdn-controller/api/path-change',
                 json={'primary_path': 'unreachable'})