Actually, It's more like this (M=, Z=, ..., Y= ~1000):
database_shard_1:
-- table_circle_1
-- table_circle...
-- table_circle_M
-- table_....
-- table_square_1
-- table_square...
-- table_square_M
database_shard_...:
-- table_circle_M+1
-- table_circle...
-- table_circle_Z
-- table_....
-- table_square_M+1
-- table_square...
-- table_square_Z
database_shard_N:
-- table_circle_Z+1
-- table_circle...
-- table_circle_Y
-- table_....
-- table_square_Z+1
-- table_square...
-- table_square_Y
table_circle_<number> all share the same table definition, but have
different names (numbers). Same goes for table_square_<number>, etc.
The number in table_square_<number> is used to determine which shard
to look in (1...N). Each shard is responsible for a range of numbers.
--diana
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