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vms:bittorrent [2017/06/01 17:17] admin [Transmission] |
vms:bittorrent [2017/06/02 04:36] (current) admin [Transmission] |
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| We'll start with the installation of a **Transmission** server, based on a [[vms:debian|Debian template]]. | We'll start with the installation of a **Transmission** server, based on a [[vms:debian|Debian template]]. | ||
| + | |||
| + | === Installation === | ||
| <Code:json> | <Code:json> | ||
| Line 43: | Line 45: | ||
| For detailed instructions on how to use Transmission: [[https://help.ubuntu.com/community/TransmissionHowTo]] | For detailed instructions on how to use Transmission: [[https://help.ubuntu.com/community/TransmissionHowTo]] | ||
| + | |||
| + | === System Configuration === | ||
| + | |||
| + | To avoid Transmission eating up all the system's resources, edit ''/lib/systemd/system/transmission-daemon.service'': | ||
| + | |||
| + | <Code> | ||
| + | > 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 | ||
| + | </Code> | ||
| + | |||
| + | Note that we reload daemons for our changes to take effect. | ||
| + | |||
| + | === UDP socket buffers === | ||
| + | |||
| + | 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: | ||
| + | <Code> | ||
| + | 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) | ||
| + | </Code> | ||
| + | |||
| + | 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: | ||
| + | <Code> | ||
| + | > echo 'net.core.rmem_max = 16777216' >> /etc/sysctl.conf | ||
| + | > echo 'net.core.wmem_max = 4194304' >> /etc/sysctl.conf | ||
| + | > sysctl -p | ||
| + | </Code> | ||
| + | |||
| + | For production servers with hundreds of connections 16MB receive and 4MB send buffers are recommended [[https://trac.transmissionbt.com/ticket/4321| read more here...]] | ||
| ===== mitorrent ===== | ===== mitorrent ===== | ||
| [[https://github.com/da2x/mitorrent]] | [[https://github.com/da2x/mitorrent]] | ||
