Chihaya

Chihaya is a high-performance BitTorrent tracker written in the Go programming language. It is still heavily under development and the current master branch should probably not be used in production (unless you know what you're doing).

Features include:

• Public tracker feature-set with full compatibility with what exists of the BitTorrent spec
• Private tracker feature-set with compatibility for a Gazelle-like deployment (WIP)
• Low resource consumption, and fast, asynchronous request processing
• Full IPv6 support, including handling for dual-stacked peers
• Extensive metrics for visibility into the tracker and swarm's performance
• Ability to prioritize peers in local subnets to reduce backbone contention
• Pluggable backend driver that can coordinate with an external database

When would I use Chihaya?

Chihaya is a eventually meant for every kind of BitTorrent tracker deployment. Chihaya has been used to replace instances of opentracker and also instances of ocelot. Chihaya handles torrent announces and scrapes in memory. However, using a backend driver, Chihaya can also asynchronously provide deltas to maintain a set of persistent data without throttling a database. This is particularly useful behavior for private tracker use-cases.

Running Chihaya

Configuration

Copy example_config.json to your choice of location, and update the values as required. An explanation of the available keys can be found in CONFIGURATION.md.

Docker

$ docker pull quay.io/jzelinskie/chihaya:latest
$ docker run -p 6881:6881 -v $DIR_WITH_CONFIG:/config:ro quay.io/jzelinskie/chihaya:latest

Developing Chihaya

Building & Installing

Chihaya requires Go 1.5+ (preferrably the latest stable Go), Godep, and a Go environment previously set up.

$ export GOPATH=$PWD/chihaya
$ git clone https://github.com/chihaya/chihaya.git chihaya/src/github.com/chihaya/chihaya
$ cd chihaya/src/github.com/chihaya/chihaya/cmd/chihaya/
$ godep restore
$ go install github.com/chihaya/chihaya/cmd/chihaya

Testing

Chihaya has end-to-end test coverage for announces in addition to unit tests for isolated components. To run the tests, use:

$ cd $GOPATH/src/github.com/chihaya/chihaya
$ godep go test -v ./...

There is also a set of benchmarks for performance-critical sections of Chihaya. These can be run similarly:

$ cd $GOPATH/src/github.com/chihaya/chihaya
$ godep go test -v ./... -bench .

Contributing

See CONTRIBUTING.md for guidelines to contributing to the project. Feel free to make issues or ask questions. Our maintainers are also always idle in #chihaya on freenode.