README.md

Sharded cluster

A sample application demonstrating how to configure a sharded cluster.

Running

To run the cluster, go to the sharding directory in the terminal and perform the following steps:

1. Install dependencies defined in the *.rockspec file:

   $ tt build sharded_cluster

2. Run the cluster:

   $ tt start sharded_cluster

3. Connect to the router:

   $ tt connect sharded_cluster:router-a-001

4. Call vshard.router.bootstrap() to perform the initial cluster bootstrap:

   sharded_cluster:router-a-001> vshard.router.bootstrap()
   ---
   - true
   ...

5. Insert test data:

   sharded_cluster:router-a-001> insert_data()
   ---
   ...

6. Connect to storages in different replica sets to see how data is distributed across nodes:

   a. storage-a-001:

   sharded_cluster:storage-a-001> box.space.bands:select()
   ---
   - - [1, 614, 'Roxette', 1986]
     - [2, 986, 'Scorpions', 1965]
     - [5, 755, 'Pink Floyd', 1965]
     - [7, 998, 'The Doors', 1965]
     - [8, 762, 'Nirvana', 1987]
   ...

   b. storage-b-001:

   sharded_cluster:storage-b-001> box.space.bands:select()
   ---
   - - [3, 11, 'Ace of Base', 1987]
     - [4, 42, 'The Beatles', 1960]
     - [6, 55, 'The Rolling Stones', 1962]
     - [9, 299, 'Led Zeppelin', 1968]
     - [10, 167, 'Queen', 1970]
   ...