ricardobcl / tanodb

distributed in memory key value store on top of riak_core, example for the little riak core book

tanodb

A riak_core application used as example for The Little Riak Core Book. Go read it for details on how it's built.

Build

rebar3 release

Test

rebar3 ct

Run

rebar3 run

Try

1> tanodb:ping().
{pong,753586781748746817198774991869333432010090217472}

Quit

2> q().

Play with Clustering

Build 3 releases that can run on the same machine:

make devrel

Start them in different consoles:

make dev1-console
make dev2-console
make dev3-console

join 2 nodes to the first one:

make devrel-join

check the status of the cluster:

make devrel-status

you should see something like this:

================================= Membership ==================================
Status     Ring    Pending    Node
-------------------------------------------------------------------------------
joining     0.0%      --      'tanodb2@127.0.0.1'
joining     0.0%      --      'tanodb3@127.0.0.1'
valid     100.0%      --      'tanodb1@127.0.0.1'
-------------------------------------------------------------------------------
Valid:1 / Leaving:0 / Exiting:0 / Joining:2 / Down:0

it should say that 3 nodes are joining, now check the cluster plan:

make devrel-cluster-plan

it should display the cluster plan, now we can commit the plan:

make devrel-cluster-commit

check the status of the cluster again:

make devrel-status

you could see the vnodes transfering:

================================= Membership ==================================
Status     Ring    Pending    Node
-------------------------------------------------------------------------------
valid      75.0%     25.0%    'tanodb1@127.0.0.1'
valid       9.4%     25.0%    'tanodb2@127.0.0.1'
valid       7.8%     25.0%    'tanodb3@127.0.0.1'
-------------------------------------------------------------------------------
Valid:3 / Leaving:0 / Exiting:0 / Joining:0 / Down:0

at some point you should see something like this:

================================= Membership ==================================
Status     Ring    Pending    Node
-------------------------------------------------------------------------------
valid      33.3%      --      'tanodb1@127.0.0.1'
valid      33.3%      --      'tanodb2@127.0.0.1'
valid      33.3%      --      'tanodb3@127.0.0.1'
-------------------------------------------------------------------------------
Valid:3 / Leaving:0 / Exiting:0 / Joining:0 / Down:0

when you are bored you can stop them:

make devrel-stop

TODO

• define license and create LICENSE file

License

TODO