[Solved] You have this ILM policy JSON:{"phases": {"hot": {"actions": {"rollover": {"max_size": "20gb"}}}, "warm": {"min_age": "10d", "actions": {"shrink": {"number_of_shards":... | Elasticsearch

Elasticsearch - Index Management

You have this ILM policy JSON:

{"phases": {"hot": {"actions": {"rollover": {"max_size": "20gb"}}}, "warm": {"min_age": "10d", "actions": {"shrink": {"number_of_shards": 1}}}}}

After applying, the shrink action never runs. What is the likely cause?

ARollover max_size is too small

BShrink action requires delete phase

CShrink action must be in hot phase

DThe index has not reached 10 days old yet

Step-by-Step Solution

Solution:

Step 1: Check warm phase min_age
Shrink runs only after index is at least 10 days old.
Step 2: Confirm index age
If index age is less than 10 days, shrink won't trigger yet.
Final Answer:
The index has not reached 10 days old yet -> Option D
Quick Check:
min_age controls action timing = C [OK]

Quick Trick: Check min_age before expecting warm phase actions [OK]

Common Mistakes:

MISTAKES

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You have this ILM policy JSON: