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Which of these generates a summary index containing a count of events by product_id?
The correct command to generate a summary index containing a count of events by product_id is:
sistats count by product_id
Here's why this works:
sistats : This command is specifically designed for creating summary indexes. It pre-aggregates data and stores it in a format optimized for fast retrieval.
count by product_id : This part of the command calculates the count of events grouped by the product_id field.
Summary indexing is useful when you want to store pre-aggregated data for faster reporting. For example, instead of querying raw data every time, you can query the summary index to get quick results.
Other options explained:
Option A : Incorrect because stats si(product_id) is invalid syntax.
Option B : Incorrect because stats is used for real-time aggregation but does not create summary indexes.
Option D : Incorrect because sistats summary index by product_id is invalid syntax.
Example:
index=main | sistats count by product_id