https://medium.com/@hax.artisan/opensearch-manage-index-alias-and-rollover-98e1ee791250 (https://redhat-internal.slack.com/archives/C041HD75V4L/p1757521778239289?thread_ts=1756943077.297379&cid=C041HD75V4L)

"""
An alias is a virtual index that points to 1 or more indexes, where indexes are grouped with alias for different operations.

Think of it like a box, holding index document with common properties, i.e different application logs, indexes rotated monthly

What is rollover and when do you want to use rollover?
When index rollover is called, backend will create a new index, and increments the index name with the pattern ^.*-\d+$

Rollover is important to keep index size small enough to improve search performance and optimized for warm/cold migration.
"""