Elasticsearch 7 and Elastic Stack - In Depth and Hands On! - Index Design Changes

The video tutorial covers the flexibility of Elasticsearch in changing index settings, focusing on dynamic and static settings. It explains the importance of sharding for availability and resiliency, and demonstrates how to change shard numbers using APIs. The tutorial includes hands-on exercises with dynamic settings, data indexing, and shard manipulation, providing practical insights into Elasticsearch's capabilities.

Why might you need to reconsider your initial index design in Elasticsearch?

• To improve performance and adjust for growth

• To reduce the number of nodes

• To increase the number of primary shards

• To eliminate the need for replicas

What is a characteristic of dynamic settings in Elasticsearch?

• They determine the number of primary shards

• They can be changed after index creation

• They are set during index creation and cannot be altered

• They affect the internal data structure

How does Elasticsearch achieve high availability?

• By disabling replicas

• By reducing the number of shards

• By spreading data across multiple nodes

• By using a single node for all data

What is the purpose of the split API in Elasticsearch?

• To multiply the number of shards

• To delete unused shards

• To reduce the number of shards

• To increase the number of primary shards

What must be done before using the shrink API in Elasticsearch?

• Increase the number of primary shards

• Ensure a copy of every shard is on the same node

• Verify the cluster health status is red

• Ensure the index is writable

What is the first step in the hands-on exercise for dynamic settings?

• Disable all replicas

• Delete all existing indices

• Create a new index with specific settings

• Increase the number of primary shards

How can you improve the resiliency of your data in Elasticsearch?

• By adding more primary shards

• By disabling the split API

• By reducing the number of nodes

• By adding a replica shard

What is a potential consequence of using the force merge API improperly?

• It can increase the number of shards

• It can lead to unexpected data loss

• It can disable all replicas

• It can make the index readonly

What is the purpose of setting an index to readonly before splitting or shrinking?

• To allow data to be written during the process

• To prevent data loss during the operation

• To increase the number of primary shards

• To disable all replicas

What is the effect of the shrink API on shards?

• It deletes all replicas

• It reduces the number of shards

• It increases the number of primary shards

• It multiplies the number of shards