What is "storage bucketing scheme" mentioned in docs?

[jakubgs]

In documentation for split_queries_by_interval the docs state:

# Split queries by an interval and execute in parallel, 0 disables it. You
# should use an a multiple of 24 hours (same as the storage bucketing scheme),
# to avoid queriers downloading and processing the same chunks. This also
# determines how cache keys are chosen when result caching is enabled
# CLI flag: -querier.split-queries-by-interval
[split_queries_by_interval: <duration> | default = 0s]

What config key specifically does same as the storage bucketing scheme refer to?

We're using S3 block storage if relevant.