[](https://travis-ci.org/tkyshm/esnowflake)
esnowflake
=====
esnowflake is Erlang/OTP application to generate uniq ID.
Original design: [Twitter IDs (snowflake)](https://github.com/twitter/snowflake).
Usage
=====
```erlang
> Id = application:start(esnowflake).
ok
> esnowflake:generate_id().
896221795344384
> esnowflake:generate_ids(2).
[896498611015681,896498611015680]
> esnowflake:to_unixtime(Id).
1509193995927
> esnowflake:stats().
[{cpu_usage,[{1,0.0024724560956761723},
{2,6.264839078604174e-5},
{3,5.2089262927343054e-5},
{4,6.222663816466355e-5},
{5,0.0},
{6,0.0},
{7,0.0},
{8,0.0}]},
{total_cpu_usage,3.311773706340549e-4},
{memory,[{total,27135728},
{processes,7463752},
{processes_used,7462824},
{system,19671976},
{atom,388625},
{atom_used,374758},
{binary,1259096},
{code,8712856},
{ets,3089264}]}]
```
Config
=====
## worker id
### application environment variable
This must be specified as not to duplicate worker ids if you use multi nodes.
- app.conf
```erlang
[
{esnowflake, [{worker_min_max_id, [0, 9]}]}
]
```
Bench
=====
```
----------------------------------------------------
2017-10-29 16:03:27.671
b_generate_id 100000 4564.13864 ns/op
----------------------------------------------------
2017-10-29 16:03:28.703
b_generate_id 232502 op/sec
%%% esnowflake_SUITE ==> bench.b_generate_id: OK
----------------------------------------------------
2017-10-29 16:03:29.700
b_generate_ids_100 10000 96834.8342 ns/op
----------------------------------------------------
2017-10-29 16:03:30.702
b_generate_ids_100 686 op/sec
%%% esnowflake_SUITE ==> bench.b_generate_ids: OK
```
