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vms:bittorrent [2017/05/31 03:50] admin [mitorrent] |
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 25: | Line 27: | ||
"incomplete-dir": "/var/lib/transmission/seeding", | "incomplete-dir": "/var/lib/transmission/seeding", | ||
"dht-enabled": true, | "dht-enabled": true, | ||
+ | "lpd-enabled": true, | ||
"pex-enabled": true, | "pex-enabled": true, | ||
"peer-limit-per-torrent": 10, | "peer-limit-per-torrent": 10, | ||
Line 41: | Line 44: | ||
For a complete description of all options: [[https://web.archive.org/web/20160428165927/https://trac.transmissionbt.com/wiki/EditConfigFiles]] | 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]] | ||
+ | |||
+ | === 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]] |