Skip to main content
🔒 Preview mode. The first 15 Foundations lessons are free; this one is Pro. Start a 7-day trial to unlock the editor, AI hints and the rest of the curriculum. Card required, cancel any time in Dashboard.
Start 7-day trial →
⚡
← Courses
›
System Design for Python Juniors
›
Module 6 · Real-World System Design Cases
›
Design search: Elasticsearch architecture
quiz
91 / 105
🇺🇸
EN
▼
↗
Share
⋯
More
+100 XP
📋
Task
📖
Theory
🤖
AI Help
Task
📝 **Question:** How does ES zero-downtime reindex? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
🎯 Quiz
Question
📝 **Question:** How does ES zero-downtime reindex? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
A
Lock the source database in read-only mode, replay every document into the new index, then unlock — accepted as standard practice for reindex jobs.
B
Write to a new index in parallel, swap the alias atomically, delete the old. Aliases are abstraction layer above indexes.
C
Pause query traffic at the load balancer until the reindex completes — the only way to guarantee consistent ranking across the cutover.
D
Reindexing without downtime is not actually supported by Elasticsearch — operators schedule a maintenance window and accept a few minutes of unavailability.
Submit answer
💬 Discussion
Be the first to ask a question or share a tip.
Sign in
to join the discussion. Reading is free.
Loading discussion…