# Is my data stream not rolling over to a new index like it's supposed to? **URL:** \ **Category:** Elasticsearch\ **Tags:** datastreams\ **Created:** [October 24, 2021, 6:02pm UTC](https://discuss.elastic.co/t/is-my-data-stream-not-rolling-over-to-a-new-index-like-its-supposed-to/287515 "2021-10-24T18:02:41Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![nsouth](https://avatars.discourse-cdn.com/v4/letter/n/ecccb3/32.png) [@nsouth](https://discuss.elastic.co/u/nsouth)\ **Post date:** [October 24, 2021, 6:02pm UTC](https://discuss.elastic.co/t/is-my-data-stream-not-rolling-over-to-a-new-index-like-its-supposed-to/287515/1 "2021-10-24T18:02:41Z")
We have a data stream created by Logstash and it's using the default index template and ILM policy. My understanding is that the data stream should roll over to a new index once the initial index has 50 GB of data or is 30 day sold. However, there's only one index and it's over 51 GB (Update: now over 55 GB). Shouldn't it have rolled over by now? Thanks for the help. ![image](https://us1.discourse-cdn.com/elastic/original/3X/b/8/b82d4cf1992ea6ad597091a1e279f292fef17493.png) ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [October 25, 2021, 4:01am UTC](https://discuss.elastic.co/t/is-my-data-stream-not-rolling-over-to-a-new-index-like-its-supposed-to/287515/2 "2021-10-25T04:01:37Z")
It's likely that storage size represents the total of both primaries and the replicas shards. ILM will rollover looks specifically at primary shard size only. ---
**Author:** ![nsouth](https://avatars.discourse-cdn.com/v4/letter/n/ecccb3/32.png) [@nsouth](https://discuss.elastic.co/u/nsouth)\ **Post date:** [October 25, 2021, 10:30am UTC](https://discuss.elastic.co/t/is-my-data-stream-not-rolling-over-to-a-new-index-like-its-supposed-to/287515/3 "2021-10-25T10:30:56Z")
Ah, you might be right. I didn't realize that there was 1 replica by default. I have confirmed now that the primary shard is about half of the size reported on this page. Thanks! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 22, 2021, 10:31am UTC](https://discuss.elastic.co/t/is-my-data-stream-not-rolling-over-to-a-new-index-like-its-supposed-to/287515/4 "2021-11-22T10:31:32Z")
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