dafs

The dafs project is an elastic file storage service. It leverages a decentralized, self-healing, ring-model architecture to provide a reliable store capacity of 2^142 bytes.

Build / Install

You will need a compiler with full C++11 support. You can then use CMake to generate MakeFiles for this project.

$ mkdir build && cd build && cmake ..
$ make install && ./unittests/all_unittests

Usage

Start a server...

$ sh contrib/create-server.sh 1 &
$ sh contrib/create-server.sh 2 &
$ sh contrib/create-server.sh 3 &
$ sh contrib/create-server.sh 4 &
$ sh contrib/create-server.sh 5 &

Join the servers into a cluster...

$ dafs-cli --port=7002 --command="join 127.0.0.1 7001"
$ dafs-cli --port=7003 --command="join 127.0.0.1 7001"
$ dafs-cli --port=7004 --command="join 127.0.0.1 7001"
$ dafs-cli --port=7005 --command="join 127.0.0.1 7001"
$ dafs-cli --port=7003 --command="list-servers"

Then upload a file...

$ echo "hello" > myfile.txt
$ dafs-cli --port=7001 --command="upload myfile.txt"

And download the file...

$ dafs-cli --port=7001 --command="list-files"
$ dafs-cli --port=7001 --command="download myfile.txt"

If one of the servers should become unavailable...

$ ps -ef | grep dafs-server | grep "port=7001" | awk '{print $2}' | xargs kill

Then the cluster will self-heal and the file will still be accessible through a different server...

$ dafs-cli --port=7002 --command="list-files"
$ dafs-cli --port=7002 --command="list-servers"