How does Kirin OS provide solutions for network traffic and bandwidth management?

How does Kirin OS provide solutions for network traffic and bandwidth management?

Introduction:
Kirin operating system is an open source operating system based on the Linux kernel, which is famous for its high performance and high degree of customizability. In terms of network applications, Kirin operating system provides a series of solutions, including network traffic and bandwidth management functions. This article will introduce how Kirin OS implements these functions and provide some code examples for reference.

1. Flow control
Kirin operating system implements the flow control function by using network device queues and flow control algorithms. By applying flow control algorithms to packets in a network device's queue, you can limit the device's send and receive rates.

The following is a sample code that shows how to use the tc (traffic control) command to implement simple traffic control:

tc qdisc add dev eth0 root handle 1: htb default 10
tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbit
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50mbit
tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10

The above code creates a hierarchical token bucket (htb) queue , and set the eth0 network card as the default queue of the root queue. The code then creates a subclass queue with a rate of 50mbit and creates an sfq queue as a subqueue of the subclass queue to achieve flow control.

2. Bandwidth Management
In addition to flow control, Kirin operating system also provides bandwidth management functions. Bandwidth management allows users to allocate network bandwidth based on application needs to ensure that each application gets a fair and appropriate share of bandwidth.

The following is a sample code that shows how to use the tc command to implement simple bandwidth management:

tc qdisc add dev eth0 root handle 1: htb default 10
tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbit
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50mbit ceil 100mbit
tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10

The above code creates a hierarchical token bucket (htb) queue and adds eth0 The network card is set as the default queue for the root queue. Then, the code creates a subclass queue with a rate of 50mbit but a maximum of 100mbit, and creates an sfq queue as a subqueue of the subclass queue to achieve bandwidth management.

3. Traffic diversion
Traffic diversion is another important network management function provided by Kirin operating system. It allows users to distribute network traffic to different links or interfaces to achieve load balancing and redundancy.

The following is a sample code that shows how to use the iptables command to implement simple traffic diversion:

iptables -t mangle -A PREROUTING -i eth0 -j CONNMARK --set-mark 1
iptables -t mangle -A PREROUTING -m mark --mark 1 -j DNAT --to-destination 192.168.1.100
iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT --to-source 192.168.1.1

The above code implements traffic diversion by setting the packet mark (mark). First, on the PREROUTING chain, the code sets the flag of packets entering the eth0 interface to 1. The code then redirects packets marked 1 to a host with a destination address of 192.168.1.100. Finally, on the POSTROUTING chain, the code rewrites the source address of packets marked 1 to 192.168.1.1 to achieve offloading of egress traffic.

Conclusion:
Kirin operating system provides powerful network traffic and bandwidth management functions, allowing users to better manage and control network applications. With features such as traffic control, bandwidth management, and traffic offloading, users can improve network performance, ensure application reliability, and efficiently utilize network resources. We hope that the code examples provided in this article will be helpful to readers' practice and research.

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