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Sharding example

How to use​

  • Install all dependencies

    npm i

  • open 4 terminals

Create and run Shard 0 database​

DATA_DIR=aedb_data_0 PORT=3000 node aedb.js

Create and run Shard 1 database​

DATA_DIR=aedb_data_1 PORT=3001 node aedb.js

Run reverse proxy​

node aedb_proxy.js

add data to database​

curl --header 'Content-Type: application/json' --data '{"data": "This is some data."}' localhost:8000/a

- ```a``` is the key parameter
- due to the hashing function logic, data will be stored in shard 1

curl --header 'Content-Type: application/json' --data '{"data": "This is some data."}' localhost:8000/b

- due to the hashing function logic, data will be stored in shard 0

Retreive data from database​

  • retreive from shard 0

    curl -w "\n" localhost:8000/a

  • retreive from shard 1

    curl -w "\n" localhost:8000/b