Sharding

[ianagbip1oti]

https://discordapp.com/developers/docs/topics/gateway#sharding

Sharding can be implemented in multiple stages. I think Stage 1 is all that is required to become an official discord lib

• Stage 1. Accept EC_SHARD_ID and EC_SHARD_NUM as environment variables and send these to Discord. The user deploying the bot is responsible for configuring each instance of the bot correctly. Stage 1 Sharding #120
• Stage 2. Connect to the Get Gateway Bot endpoint to retrieve the recommended number of shards. Based upon that result setup N shards per host. For example, with EC_SHARD_NUM=2 and a recommendation of 5 shards from the endpoint, host 1 would connect as shards 0,1,2, with host 2 connecting as shards 3,4.
• Stage 3. Using a shared/clustered data store determine how many instances of the bot are running to work out EC_SHARD_NUM and EC_SHARD_ID automatically. Then setup N shards per host as per step 2.
• Stage 4. Automated shard addition and removal. Using the data store as in Stage 3 monitor factors that could affect the number of shards we need to have. e.g., the recommendation from discord, the number of hosts running, hosts going down etc.