# Typeahead
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- [Scenario](#scenario)
- [Initial design](#initial-design)
- [Storage](#storage)
- [Query service DB](#query-service-db)
- [Word count table](#word-count-table)
- [Prefix table](#prefix-table)
- [Trie](#trie)
- [Data collections service](#data-collections-service)
- [Scale](#scale)
- [How to reduce response time](#how-to-reduce-response-time)
- [What if the trie too large for one machine](#what-if-the-trie-too-large-for-one-machine)
- [How to reduce the size of log file](#how-to-reduce-the-size-of-log-file)
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