#=====================
[
  {
    _id => '12313112',
    username => 'batman',
    name => 'Bruce'
    age => 32,
  },
  {
    _id => '89213112',
    username => 'marcus',
    name => 'Marcus'
    age => 25,
  },
]
#=====================

persons:i:name:jan = [ 89213112 ]       # set (meta: lowercase or case)
persons:i:name:bruce = [ 12313112 ]     # set
persons:i:username = [ marcus, batman ] # set (unique index)
persons:i:_id = [ 12313112, 89213112 ]  # zset (unique index + order by insert date)

persons:12313112:m:keys = [ _id, name, age ] # set
persons:12313112:d:_id = 12313112
persons:12313112:d:name = Bruce
persons:12313112:d:age = 32

persons:89213112:m:keys = [ _id, name, age ] # set
persons:89213112:d:_id = 89213112
persons:89213112:d:name = Marcus
persons:89213112:d:age = 25