<ul><li>When a log record has keys like test.test, you can use two methods record_transformer and explode plugin, to process these keys and create a nested structure.</li><li>Using the record_transformer method, you need to follow several steps to create nested fields, while the explode plugin can achieve this in one step.</li><li>The explode plugin breaks top-level keys with dots into nested structures, allowing easy manipulation of the fields.</li><li>To use the explode plugin, you need to install it using the command 'gem install fluent-plugin-explode_filter'.</li></ul>

Fluentd: How to Make Nested Hash from Dot-Separated Keys

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