# Confusion on ILM policy and please help me to understand it **URL:** \ **Category:** Elasticsearch\ **Created:** [October 6, 2021, 3:37am UTC](https://discuss.elastic.co/t/confusion-on-ilm-policy-and-please-help-me-to-understand-it/285969 "2021-10-06T03:37:39Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Blason](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/blason/32/42284_2.png) [@Blason](https://discuss.elastic.co/u/Blason)\ **Post date:** [October 6, 2021, 3:37am UTC](https://discuss.elastic.co/t/confusion-on-ilm-policy-and-please-help-me-to-understand-it/285969/1 "2021-10-06T03:37:39Z")
Hi Team, I am working on a system where I expect daily I am going to ingest a data about 15 GB and my total retention of data should be about 365 days. However my active data would be about 1 month of indices. After 1 month data can be moved to warm and after 60 days it can be moved to cold. Please help me to understand my ILM policy since I am very much confused on designing the policy. Hot Phase -\> Enable Rollover 15 GB Maximum age 1 day? Do I need to go for Force merge & Shrink in Hot phase? Warm Phase What should be value here? 30 Days? And same way what should be the cold phase 90 Days? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 3, 2021, 3:37am UTC](https://discuss.elastic.co/t/confusion-on-ilm-policy-and-please-help-me-to-understand-it/285969/2 "2021-11-03T03:37:52Z")
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