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RTOS设备通过TCP模组上云

想让RTOS设备通过TCP模组接入阿里云物联网平台?本篇最佳实践指南提供从创建产品、搭建环境到设备端开发的全流程步骤,助您快速高效地完成设备上云。

优化Terway模式下conntrack配置

conntrack是连接跟踪机制的一种实现,用于跟踪和记录网络连接的状态,例如TCP连接的状态(SYN、ESTABLISHED、CLOSED等)。在Terway Datapath V2或者IPvlan模式下,容器内流量对应的conntrack信息在eBPF map内存储,其他模式下conntrack信息...

为什么Linux系统的ECS实例中出现大量“TCP:time wait ...

本文介绍Linux系统的ECS实例的/var/log/messages中,出现大量“TCP:time wait bucket table overflow”错误的原因和解决方案。问题现象 Linux系统的ECS实例的/var/log/messages中,出现大量“TCP:time wait bucket table overflow”错误。...

Implement HAL functions to connect to IoT Platform...

Description Destroys a TCP connection that is specified by the fd parameter and releases the related resources.Parameters Parameter Type Category Description fd uintptr_t Input The TCP connection handle.Return value ...

TCP health checks

A TCP health check is a network protocol that Global Traffic Manager(GTM)uses to check the health of target addresses.This health check monitors metrics such as network reachability,port availability,and the latency of IP ...

What do I do if the TCP congestion control ...

Alibaba Cloud Linux 2 supports the following kernel TCP congestion control algorithms:Reno,Bottleneck Bandwidth and Round-trip propagation time(BBR),and CUBIC.These algorithms perform differently in various network ...

How do I troubleshoot HTTP/TCP health check ...

This topic describes how to troubleshoot the HTTP/TCP health check failures of a persistent application instance that is registered with a Microservices Engine(MSE)Nacos instance.Problem description When an HTTP/TCP health...

无操作系统设备通过TCP模组上云

想让无操作系统MCU通过TCP模组接入阿里云物联网平台?本官方指南遵循SDK移植思路,提供从创建产品、搭建环境到设备开发的完整步骤,助您快速完成设备上云。

Add a TCP/SSL listener

If you want your Network Load Balancer(NLB)instance to forward TCP requests in scenarios that have high requirements for performance and large-scale TLS offloading,you can add a TCP/SSL listener to your NLB instance....

Common issues and solutions when using tcpdump or ...

Issue:The[TCP segment of a reassembled PDU]message appears during packet capture,as shown in the following figure.Possible cause:This message indicates TCP protocol segments of a reassembled PDU.It indicates that Wireshark...

环境准备

公共部分:DNS:114.114.114.114 53 或者 223.5.5.5 53(UDP)NTP1:ntp1.aliyun.com 123 (TCP)NTP2:ntp2.aliyun.com 123 (TCP)OSS:vuldb-b.oss-cn-shanghai.aliyuncs.com 443 (TCP/HTTPS)vuldb-a.oss-cn-shanghai.aliyuncs.com 443 (TCP/HTTPS...

创建资源

在调用TCP协议的SDK收发消息前,您需在 云消息队列 RocketMQ 版 控制台创建相关资源。您在调用SDK时需填写这些资源信息。前提条件 开通消息队列服务并授权 背景信息 针对TCP和HTTP两种通信协议,云消息队列 RocketMQ 版 分别提供了多语言...

DescribeDDosEventAttackType

Reflect-Flood:CoAP reflection attacks ADDP-Reflect-Flood:ADDP reflection attacks Tcp-Syn:TCP SYN flood attacks Tcp-Fin:TCP FIN flood attacks Tcp-Ack:TCP ACK flood attacks Tcp-Rst:TCP RST flood attacks Tcp-Pushack:TCP PSH-...

Description of Telemetry fields

CLOSED_CONNECTIONS Counter of TCP connections closed over the lifetime of a workload TCP_SENT_BYTES Counter of bytes that are sent during a response over a TCP connection TCP_RECEIVED_BYTES Counter of bytes that are ...

通过 PROXY Protocol v1/v2 协议获取客户端真实 IP

协议介绍 PROXY Protocol协议用于在TCP连接建立时获取客户端的真实IP地址。需要您在控制台选择该协议,功能打开后,加速服务器和源站将建立TCP连接,并在发送用户请求前,先通过 PROXY Protocol 协议传递客户端IP信息。协议差异 协议 PROXY...

NLB监听

支持的监听协议 协议 说明 使用场景 相关链接 TCP 面向连接的协议,在正式收发数据前,必须和对方建立可靠的连接。数据传输可靠。适用于注重可靠性,对数据准确性要求高,速度可以相对较慢的场景,如文件传输、发送或接收邮件、远程登录。...

Cannot assign requested address报错

解决方案 使用Pconnect替换Connect(推荐)用长连接替代短连接,该方案可减少TCP连接,同时可以避免每次请求都会重新建立连接的问题,减少延时。例如Connect连接代码示例如下:$redis-connect('[$Hostname]',[$Port]);redis-auth('[$Inst_...

Telemetry CRD

TCP_RECEIVED_BYTES mode:CLIENT tagOverrides:{}-disabled:false match:metric:TCP_RECEIVED_BYTES mode:SERVER tagOverrides:{}-disabled:false match:metric:TCP_OPENED_CONNECTIONS mode:CLIENT tagOverrides:{}-disabled:false match:...

默认防护策略

游戏TCP策略 过滤不符合协议规范的畸形报文 过滤明确攻击特征的TCP/UDP/ICMP报文 过滤IP分片报文及非TCP/非UDP/非ICMP的协议 对部分异常访问源IP进行校验及限速 对UDP报文进行严格校验及限制 业务形态以TCP接入为主时,建议您选择此策略。...

Sidecar Acceleration using eBPF

Sidecar Acceleration using eBPF adopts eBPF sockops to accelerate TCP-based communication.If TCP-based communication is accelerated after a TCP connection is established,TCP requests are no longer transmitted by the TCP/IP...

System configuration optimization

the retransmission timeout(RT)doubles with each attempt from the initial value set by tcp_synack_timeout_init,up to the maximum value defined by tcp_synack_timeout_max.Important This is a custom feature developed for ...

Configure redirection of HTTP or TCP health check ...

After you add an application to a Service Mesh(ASM)instance,a sidecar proxy is injected into the pod of the application.The sidecar proxy intercepts all requests sent to the application.If you enable HTTP or TCP health ...

Linux instance TCP backlog cache overflow caused ...

party products will not be provided by Alibaba Cloud after-sales support.This document is for reference only.Alibaba Cloud makes no guarantee by express or any other means.Problem description If the TCP backlog cache ...

Sidecar Acceleration using eBPF

Sidecar Acceleration using eBPF adopts eBPF sockops to accelerate TCP-based communication.If TCP-based communication is accelerated after a TCP connection is established,TCP requests are no longer transmitted by the TCP/IP...

Add a TCP listener

If your services are sensitive to reliability,data consistency,and data integrity but can tolerate a relatively low transmission speed,such as file transmission,email services,and remote logon,you can add a TCP listener to...

管理集群外服务

apiVersion:networking.istio.io/v1alpha3 kind:ServiceEntry metadata:name:mysql-external spec:hosts:mysql-01.foo.bar addresses:10.0.0.5/32-10.0.0.6/32 ports:name:tcp number:3306 protocol:tcp location:MESH_EXTERNAL 如果您有多...

Log fields

pps.out_syn_speed The outbound TCP session establishment rate.Unit:pps.In_syn_ack_speed The inbound TCP session acknowledgement rate.Unit:pps.out_syn_ack_speed The outbound TCP session acknowledgement rate.Unit:pps.In_fin_...

Configure an NLB instance using annotations

cloud-loadbalancer-id:"${your-nlb-id}"#The ID of the NLB instance.service.beta.kubernetes.io/alibaba-cloud-loadbalancer-force-override-listeners:"true"name:nginx namespace:default spec:ports:name:tcp port:80 protocol:TCP ...

管理集群外服务

apiVersion:networking.istio.io/v1alpha3 kind:ServiceEntry metadata:name:mysql-external spec:hosts:mysql-01.foo.bar addresses:10.0.0.5/32-10.0.0.6/32 ports:name:tcp number:3306 protocol:tcp location:MESH_EXTERNAL 如果您有多...

Configure an NLB instance using annotations

B}:${vsw-B}"#For example,cn-hangzhou-k:vsw-i123456,cn-hangzhou-j:vsw-j654321. name: nginx namespace: default spec: externalTrafficPolicy: Local ports: - name: tcp port:80 protocol:TCP targetPort:80-name:...

Use annotations to configure NLB instances

only mode for an NLB instance Retain automatically created NLB instances when you delete a Service Common annotations that are used to configure listeners Create listeners Create TCP listeners Create UDP listeners Create ...

压测TCP协议

您可通过PTS控制台快速实现TCP协议压测。本文介绍如何对TCP协议进行压测。功能入口 登录 PTS控制台,在左侧导航栏选择 性能测试 创建场景,然后单击 TCP/UDP压测。在 创建TCP/UDP场景 页面,填写 场景名,选择 协议类型 为 TCP。在 场景...

SDK reference overview

✅ indicates that the feature is supported,and ❌ indicates that the feature is not supported.Item RocketMQ 5.x gRPC SDK RocketMQ 5.x Remoting SDK RocketMQ 4.x/3.x SDK RocketMQ ONS TCP 1.x SDK RocketMQ ONS TCP 2.x SDK ...
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