Appendix on Advanced Beginnerhttps://advanced-beginner.github.io/en/docs/elasticsearch/appendix/Recent content in Appendix on Advanced BeginnerHugoen-USd8lzz1gpw@mozmail.com (kimbenji)d8lzz1gpw@mozmail.com (kimbenji)Mon, 23 Mar 2026 19:08:15 +0900Glossaryhttps://advanced-beginner.github.io/en/docs/elasticsearch/appendix/glossary/Sat, 10 Jan 2026 00:00:00 +0000d8lzz1gpw@mozmail.com (kimbenji)https://advanced-beginner.github.io/en/docs/elasticsearch/appendix/glossary/<blockquote class="book-hint info"><strong>TL;DR</strong><br><ul> <li><strong>Index/Document/Field</strong>: Corresponds to Table/Row/Column in RDB</li> <li><strong>Shard/Replica</strong>: Basic units of data distribution and replication</li> <li><strong>Analyzer/Tokenizer</strong>: Breaks text into searchable tokens</li> <li><strong>Query/Filter Context</strong>: Search methods distinguished by scoring calculation</li> <li>Sorted alphabetically, each term links to related concept documents</li> </ul> </blockquote> <p>Quick reference for Elasticsearch core terms. For detailed explanations, see the <a href="https://advanced-beginner.github.io/en/docs/elasticsearch/concepts/">Concepts</a> section.</p> <h2 id="a-e">A-E<a class="anchor" href="#a-e">#</a></h2> <h3 id="aggregation">Aggregation<a class="anchor" href="#aggregation">#</a></h3> <p>Feature for grouping search results and calculating statistics. Similar to SQL&rsquo;s <code>GROUP BY</code>. Three types: Bucket/Metric/Pipeline. → <a href="https://advanced-beginner.github.io/en/docs/elasticsearch/concepts/aggregations/">Aggregations</a> | <a href="https://advanced-beginner.github.io/en/docs/elasticsearch/concepts/query-dsl/">Query DSL</a></p>FAQhttps://advanced-beginner.github.io/en/docs/elasticsearch/appendix/faq/Sat, 10 Jan 2026 00:00:00 +0000d8lzz1gpw@mozmail.com (kimbenji)https://advanced-beginner.github.io/en/docs/elasticsearch/appendix/faq/<blockquote class="book-hint info"><strong>TL;DR</strong><br><ul> <li><strong>ES vs RDB</strong>: Use ES for full-text search/log analysis, RDB for transactions/JOINs</li> <li><strong>text vs keyword</strong>: text is for search (analyzed), keyword is for filter/sort (not analyzed)</li> <li><strong>Performance issues</strong>: Use Filter Context, return only needed fields, <code>search_after</code> pagination</li> <li><strong>Korean search</strong>: Nori analyzer installation required</li> <li><strong>Common errors</strong>: Most caused by disk shortage, memory shortage, or type mismatch</li> </ul> </blockquote> <p>Frequently asked questions and answers.</p> <h2 id="basic-concepts">Basic Concepts<a class="anchor" href="#basic-concepts">#</a></h2> <h3 id="elasticsearch-vs-rdb-when-should-i-use-what">Elasticsearch vs RDB, when should I use what?<a class="anchor" href="#elasticsearch-vs-rdb-when-should-i-use-what">#</a></h3> <table> <thead> <tr> <th>Situation</th> <th>Recommendation</th> </tr> </thead> <tbody> <tr> <td>Full-text search</td> <td>Elasticsearch</td> </tr> <tr> <td>Transaction integrity needed</td> <td>RDB</td> </tr> <tr> <td>Complex JOINs</td> <td>RDB</td> </tr> <tr> <td>Real-time aggregation/analysis</td> <td>Elasticsearch</td> </tr> <tr> <td>General CRUD</td> <td>RDB</td> </tr> <tr> <td>High-volume log storage</td> <td>Elasticsearch</td> </tr> </tbody> </table> <p><strong>Common pattern:</strong> Use RDB as main store, Elasticsearch as search secondary store.</p>Referenceshttps://advanced-beginner.github.io/en/docs/elasticsearch/appendix/references/Sat, 10 Jan 2026 00:00:00 +0000d8lzz1gpw@mozmail.com (kimbenji)https://advanced-beginner.github.io/en/docs/elasticsearch/appendix/references/<blockquote class="book-hint info"><strong>TL;DR</strong><br><ul> <li><strong>Official Documentation</strong>: Elastic official guide, Spring Data Elasticsearch documentation</li> <li><strong>Korean Resources</strong>: Real-world cases from Woowahan Brothers, Kakao, Naver D2 tech blogs</li> <li><strong>Cloud Services</strong>: Elastic Cloud (official), Amazon OpenSearch (AWS integration), Self-Managed (full control)</li> <li><strong>Learning Path</strong>: Official free training → Korean blogs → Elastic certification</li> </ul> </blockquote> <p>Official documentation, recommended books, and community resource links.</p> <h2 id="official-documentation">Official Documentation<a class="anchor" href="#official-documentation">#</a></h2> <h3 id="elasticsearch">Elasticsearch<a class="anchor" href="#elasticsearch">#</a></h3> <ul> <li><a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html">Elasticsearch Official Guide</a></li> <li><a href="https://www.elastic.co/guide/en/elasticsearch/client/index.html">Elasticsearch Client Documentation</a></li> <li><a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/rest-apis.html">REST API Reference</a></li> <li><a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html">Query DSL Reference</a></li> </ul> <h3 id="kibana">Kibana<a class="anchor" href="#kibana">#</a></h3> <ul> <li><a href="https://www.elastic.co/guide/en/kibana/current/index.html">Kibana Official Guide</a></li> <li><a href="https://www.elastic.co/guide/en/kibana/current/console-kibana.html">Dev Tools Usage</a></li> </ul> <h3 id="spring-data-elasticsearch">Spring Data Elasticsearch<a class="anchor" href="#spring-data-elasticsearch">#</a></h3> <ul> <li><a href="https://docs.spring.io/spring-data/elasticsearch/reference/">Spring Data Elasticsearch Official Docs</a></li> <li><a href="https://github.com/spring-projects/spring-data-elasticsearch">Spring Data Elasticsearch GitHub</a></li> </ul> <h2 id="recommended-books">Recommended Books<a class="anchor" href="#recommended-books">#</a></h2> <h3 id="beginner">Beginner<a class="anchor" href="#beginner">#</a></h3> <table> <thead> <tr> <th>Book</th> <th>Author</th> <th>Features</th> </tr> </thead> <tbody> <tr> <td>Elasticsearch in Action (2nd Ed)</td> <td>Madhusudhan Konda</td> <td>Hands-on examples</td> </tr> <tr> <td>Learning Elastic Stack 8.0</td> <td>Pranav Shukla</td> <td>Full ELK stack coverage</td> </tr> </tbody> </table> <h3 id="advanced">Advanced<a class="anchor" href="#advanced">#</a></h3> <table> <thead> <tr> <th>Book</th> <th>Author</th> <th>Features</th> </tr> </thead> <tbody> <tr> <td>Elasticsearch: The Definitive Guide</td> <td>Clinton Gormley</td> <td>Principle understanding (older version but useful for concepts)</td> </tr> <tr> <td>Relevant Search</td> <td>Doug Turnbull</td> <td>Search relevance optimization</td> </tr> </tbody> </table> <h2 id="online-courses">Online Courses<a class="anchor" href="#online-courses">#</a></h2> <h3 id="free">Free<a class="anchor" href="#free">#</a></h3> <ul> <li><a href="https://www.elastic.co/training/free">Elastic Official Training</a> - Free foundational courses</li> <li><a href="https://www.youtube.com/c/Aborla">YouTube: Elastic Official Channel</a></li> </ul> <h3 id="paid">Paid<a class="anchor" href="#paid">#</a></h3> <ul> <li><a href="https://www.elastic.co/training/certification">Elastic Certification Program</a></li> <li>Udemy, Coursera Elasticsearch courses</li> </ul> <h2 id="community">Community<a class="anchor" href="#community">#</a></h2> <h3 id="forums--qa">Forums &amp; Q&amp;A<a class="anchor" href="#forums--qa">#</a></h3> <ul> <li><a href="https://discuss.elastic.co/">Elastic Discuss</a> - Official forum</li> <li><a href="https://stackoverflow.com/questions/tagged/elasticsearch">Stack Overflow elasticsearch tag</a></li> </ul> <h3 id="korean-community">Korean Community<a class="anchor" href="#korean-community">#</a></h3> <ul> <li><a href="https://www.facebook.com/groups/elasticsearch.kr/">Elastic Korean User Group</a></li> <li><a href="https://www.meetup.com/ko-KR/elasticsearch-korea/">Korean Elasticsearch Meetup</a></li> </ul> <h3 id="korean-learning-resources">Korean Learning Resources<a class="anchor" href="#korean-learning-resources">#</a></h3> <h4 id="blogs--articles">Blogs &amp; Articles<a class="anchor" href="#blogs--articles">#</a></h4> <table> <thead> <tr> <th>Topic</th> <th>Link</th> <th>Features</th> </tr> </thead> <tbody> <tr> <td>ES Basics</td> <td><a href="https://techblog.woowahan.com/">Woowahan Brothers Tech Blog</a></td> <td>Real-world application cases</td> </tr> <tr> <td>Search Optimization</td> <td><a href="https://tech.kakao.com/">Kakao Tech Blog</a></td> <td>Large-scale search experience</td> </tr> <tr> <td>Log Analysis</td> <td><a href="https://d2.naver.com/">Naver D2</a></td> <td>ELK stack operation</td> </tr> <tr> <td>Infrastructure</td> <td><a href="https://medium.com/daangn">Daangn Tech Blog</a></td> <td>Startup ES adoption story</td> </tr> </tbody> </table> <h4 id="recommended-korean-articles">Recommended Korean Articles<a class="anchor" href="#recommended-korean-articles">#</a></h4> <ul> <li>&ldquo;Elasticsearch Search Quality Improvement&rdquo; - Real-world search relevance tuning</li> <li>&ldquo;Migrating 100M Records to ES&rdquo; - High-volume indexing optimization</li> <li>&ldquo;Zero-Downtime ES Cluster Upgrade&rdquo; - Version upgrade during operation</li> <li>&ldquo;Customizing Nori Analyzer&rdquo; - Improving Korean search quality</li> </ul> <h4 id="korean-books">Korean Books<a class="anchor" href="#korean-books">#</a></h4> <table> <thead> <tr> <th>Book</th> <th>Features</th> </tr> </thead> <tbody> <tr> <td>Elasticsearch Practical Guide</td> <td>Korean, practice-focused</td> </tr> <tr> <td>ElasticSearch from Fundamentals</td> <td>Beginner-friendly</td> </tr> </tbody> </table> <blockquote class='book-hint '> <p><strong>Tip</strong>: Combining English official docs with Korean blogs accelerates understanding.</p>