We'll start with the installation of a Transmission server, based on a Debian template.
> apt-get install transmission-daemon
This will start the transmission daemon process (service), it will be running under a new user created at install time: 'debian-transmission'. Note that, at the same time, a directory belonging to this same user was also created: '/var/lib/transmission-daemon'. It contains a 'downloads' folder and a symlink to the configuration directory.
We'll create a “seeding” directory and edit the configuration file, for this we need to stop the service first:
> mkdir /var/lib/transmission-daemon/seeding > chown debian-transmission:debian-transmission /var/lib/transmission-daemon/seeding > service transmission-daemon stop > nano /var/lib/transmission-daemon/info/settings.json
Refering to https://ctrl.blog/entry/how-to-server-seeding-dht-torrents, here are the important settings to set:
"download-dir": "/var/lib/transmission/seeding", "incomplete-dir": "/var/lib/transmission/seeding", "dht-enabled": true, "lpd-enabled": true, "pex-enabled": true, "peer-limit-per-torrent": 10, "port-forwarding-enabled": false, "queue-stalled-enabled": false, "speed-limit-down": 50, "speed-limit-down-enabled": true, "speed-limit-up": 50, "speed-limit-up-enabled": true, "upload-slots-per-torrent": 5, "user-has-given-informed-consent": true, "watch-dir": "/var/lib/transmission/seeding", "watch-dir-enabled": true,
For a complete description of all options: https://web.archive.org/web/20160428165927/https://trac.transmissionbt.com/wiki/EditConfigFiles
For detailed instructions on how to use Transmission: https://help.ubuntu.com/community/TransmissionHowTo
To avoid Transmission eating up all the system's resources, edit /lib/systemd/system/transmission-daemon.service:
> nano /lib/systemd/system/transmission-daemon.service ADD @ end of [Service] section [Service] ... Nice=16 IOSchedulingClass=idle CPUSchedulingPolicy=idle MemoryMax=25M MemoryHigh=35M ProtectSystem=true > systemctl daemon-reload
Note that we reload daemons for our changes to take effect.
Setting “message-level”: 3, in /var/lib/transmission-daemon/info/settings.json, then monitoring /var/log/syslog, or better /var/log/daemon.log will show:
Jun 2 04:18:24 transmission-20 transmission-daemon[4243]: [2017-06-02 04:18:24.532 CEST] UDP Failed to set receive buffer: requested 4194304, got 425984 (tr-udp.c:78) Jun 2 04:18:24 transmission-20 transmission-daemon[4243]: [2017-06-02 04:18:24.534 CEST] UDP Failed to set send buffer: requested 1048576, got 425984 (tr-udp.c:89)
It seems Transmission is willing to get a 4MB receive buffer and a 1MB send buffer, while only 256K are available. We'll fix that using the following commands:
> echo 'net.core.rmem_max = 16777216' >> /etc/sysctl.conf > echo 'net.core.wmem_max = 4194304' >> /etc/sysctl.conf > sysctl -p
For production servers with hundreds of connections 16MB receive and 4MB send buffers are recommended read more here...
https://github.com/da2x/mitorrent
First we must follow this installation guide to setup an appropriate python environment, we also need to have 'git' installed, so we can clone the GitHub repo.
> apt-get install git-core > su py3 > cd $HOME > git clone https://github.com/da2x/mitorrent.git > cd mitorrent > mkvirtualenv mitorrent > chmod +x mitorrent-runner.py
> su py3 > cd $HOME/mitorrent > workon mitorrent > ./mitorrent-runner.py path/to/original/file > path/to/torrent/file.torrent