I know a process can be paused by kill -STOP "$pid" The pausing should not close the connection to the website, either it should wait for resume command or the bandwidth throttled to very low data useage. I want to pause downloads too many times depending on events such as power failure, Network unavailability, etc. First start download, then kill wget, then resume download by wget -c. A big file can be downloaded by using wget. Qdisc tbf 10: rate 256Kbit burst 1599b lat 26.When downloading big files it necessary to pause the download many times. Sent 0 bytes 0 pkts (dropped 0, overlimits 0 ) The output of the above command would be as below qdisc netem 1: limit 1000 delay 100.0ms
To see the list of rules assigned in tc for interface eth0 # tc -s qdisc ls dev eth0 To add the data rate in tbf, packet buffer size and maximum burst limit # tc qdisc add dev eth0 parent 1:1 handle 10: tbf rate 256kbit buffer 1600 limit 3000 To add the delay of each packet going/coming through the interface eth0 # tc qdisc add dev eth0 root handle 1:0 netem delay 100ms In this example, we use Token Bucket Filter (TBF) to limit output. There is no rate control built-in to the netem discipline, instead use one of the other disciplines that does do rate control. To attach a TBF with a sustained maximum rate of 0.5mbit/s, a peakrate of 1.0mbit/s, a 5kilobyte buffer, with a pre-bucket queue size limit calculated so the TBF causes at most 70ms of latency, with perfect peakrate behaviour, issue: # tc qdisc add dev eth0 root tbf rate 0.5mbit \ burst 5kb latency 70ms peakrate 1mbit \ minburst 1540Īnother example of usign tc and netem would be as follows (found in ): One example of TBF would be as follows (ref. Tc uses Token Bucket Filter (TBF) to control the rate. I am assuming that you use only wget or curl and no other application is exchanging traffic through the network interface. It is possible to limit the traffic rate using the tc and netem tools but this will limit the rate for the network interface of the computer.
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