Replication and primary key issues


 

i have customer experiencing issue unsure how resolve.  have 3 databases, 2 downstream databases replicate single database.  have same schema across 3 databases.  when devices report downstream database, records replicated up. 

what happening when customer moves device 1 downstream database other, start seeing primary key errors.  example, lets , b downstream databases, if device reported a, there record device in replicated up.  if move device b, see primary key errors.  can exact errors if necessary. 

how sql replication handle this?  expect if record exists update, not insert.  since cannot have duplicate rows same id, appears if database b replicating trying insert instead of update, can true?

add column originating server id pks , give column default of @@servername. way not these collisions. option use dbcc checkident reseed identity elements ranges of identity values not collide.

for example on server don't anything. on server b set identity values start @ 10,000,000. on server c set identity values start @ 20,000,000.

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SQL Server  >  SQL Server Replication



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