It is already documented in the official HBase guide, look at the expressions in bold:
- About the number of column families
HBase - , . , , , , , , , . / (To be ). . .
, . , ; .. , .
33,1. ColumnFamilies
ColumnFamilies , (.. ). ColumnFamilyA 1 , ColumnFamilyB 1 , ColumnFamilyAs, , , ( RegionServers). ColumnFamilyA .
, , , TTL () (, , ...), , , , .. 30 .
, HBase Amandeep Khurana