# Upgrading from 0.3.x to 0.4.x

Version `0.4.0` moved the `:bulk_page_size` and `:bulk_wait_interval` settings
into each index's configuration, rather than global on the cluster.

## Rationale

This makes it easier to have different bulk settings for different indexes.

## Changes

**BREAKING**: `:bulk_page_size` and `:bulk_wait_interval` are now configured
on the index, not the cluster.

**FEATURE**: You can now pass `--bulk-wait-interval` and `--bulk-page-size`
options to `mix elasticsearch.build`, as requested in [#26](https://github.com/infinitered/elasticsearch-elixir/issues/26).

## How to Update Your App

Move the `:bulk_page_size` and `:bulk_wait_interval` settings to your index
rather than your entire cluster.

    # BEFORE
    config :my_app, MyApp.ElasticsearchCluster,
      api: Elasticsearch.API.HTTP,
      json_library: Poison,
      url: "http://localhost:9200",
      username: "username",
      password: "password",
      bulk_page_size: 5000,
      bulk_wait_interval: 0,
      indexes: %{
        posts: %{
          settings: "test/support/settings/posts.json",
          store: Elasticsearch.Test.Store,
          sources: [Post]
        }
      }

    # AFTER
    config :my_app, MyApp.ElasticsearchCluster,
      api: Elasticsearch.API.HTTP,
      json_library: Poison,
      url: "http://localhost:9200",
      username: "username",
      password: "password",
      indexes: %{
        posts: %{
          settings: "test/support/settings/posts.json",
          store: Elasticsearch.Test.Store,
          sources: [Post],
          bulk_page_size: 5000,
          bulk_wait_interval: 0
        }
      }