Reindexing data in Elasticsearch - Mini Project: Build & Apply

Reindexing data

📖 Scenario: You have an Elasticsearch index with some documents. You want to copy all documents from this old index to a new index with a different name.

🎯 Goal: Learn how to create a reindex request in Elasticsearch to copy data from one index to another.

📋 What You'll Learn

Create a JSON object for the source index named old_index

Create a JSON object for the destination index named new_index

Write the reindex request JSON with source and dest fields

Print the final reindex JSON object

💡 Why This Matters

🌍 Real World

Reindexing is used when you want to rename an index, change mappings, or move data between clusters.

💼 Career

Knowing how to create and use reindex requests is important for Elasticsearch administrators and developers managing search data.

1

Create the source index JSON

Create a JSON object called source with a key index set to the string "old_index".

Elasticsearch

# Create the source index JSON object
# Your code here

Need a hint?

Use curly braces to create a dictionary with key index and value "old_index".

2

Create the destination index JSON

Create a JSON object called dest with a key index set to the string "new_index".

Elasticsearch

source = {"index": "old_index"}
# Create the destination index JSON object
# Your code here

Need a hint?

Similar to step 1, create a dictionary with key index and value "new_index".

3

Create the reindex request JSON

Create a JSON object called reindex_request with keys source and dest set to the variables source and dest respectively.

Elasticsearch

source = {"index": "old_index"}
dest = {"index": "new_index"}
# Create the reindex request JSON object
# Your code here

Need a hint?

Use a dictionary with keys source and dest pointing to the previously created variables.

4

Print the reindex request JSON

Write a print statement to display the reindex_request JSON object.

Elasticsearch

source = {"index": "old_index"}
dest = {"index": "new_index"}
reindex_request = {"source": source, "dest": dest}
# Print the reindex request JSON object
# Your code here

Need a hint?

Use print(reindex_request) to show the final JSON object.