Smartstore storage requirement for rf/sf as 2

[payl_chdhry]

What would be the storage requirement for SmartStore when rf is 2 for indexer cluster.
Would it be double that of traditional for one indexer or only primary buckets would move to smartstore? Antyhing specifically mentioned in Splunk docs? (I have tried to find but did not see anything)

Consider following scenarios:
1) 2 onprem Indexers with dedicated storage, rf is 2. Each indexer has 5 TB of data. So combined would be 10 TB
2) 4 indexers - 2 sites, 2 on each site. Each site will maintain 1 copy of bucket. Again combined storage would be 10 TB

When migrating to SmartStore, what would be the expected storage utilization?

[richgalloway]

RF/SF does not apply to SmartStore so the storage usage would be 5TB.  Of the 5TB. the hot buckets would be on the indexers (and replicated) and the rest would be in S2.