Build Status

esnowflake

esnowflake is Erlang/OTP application to generate uniq ID.
Original design: Twitter IDs (snowflake).

Usage

> 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.

[

    {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