Replication and Realignment/R&R queues

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 Replication and Realignment

1. §The replication and realignment service within the CRM Middleware determines receivers for BDoc messages based upon a replication model. This model can contain distribution rules of varying complexity, from simple object subscriptions to criteria-based rules involving interdependencies between business objects.
2. § §Data distribution is controlled by replication objects, publications, subscriptions
3. § §Managed through the admin console ( tcode: SMOEAC)
4. § §The replication and realignment service determines the receivers for a particular bdoc message

Replication 

 

§Replication objects can be of type-

• -Bulk :all the content of that bdoc type is replicated to assigned sites.Typically used for customizing data. Does not support content based realignment

• -Intelligent:replication objects are distributed based on their content and relation to other objects. Replication rules are used.
• §Eg:customer data can be distributed to sites based on sales area/account group

• -Dependent:the data is distributed to those clients who also receiver the parent bdoc data via intelligent replication
• §Eg: salesdocument data is dependent on customer 

 

Realignment

 

§Realignment is the redistribution of data to the sites assigned to publications

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• -Eg: a realignment can be triggered when the criteria in a subscription is changed, old data which no longer fits the criteria is deleted from thelocal client db , & new data is sent
• -Deleting or creating a new site assignment to a subscription triggers a major realignment & the data in the realignment queues can be pretty volumnous
• -Major realignments should be carefully planned so as to maintain system optimum performance , else large number of qrfc messages can slow down processing &affect system work processing 

 

R&R queues

 

§R&R queues are of 5 types-

• -SUBCHECK-contains messages created from Admin console via creating a new subcription or deleting an old one.
• -REALIGN- realignment messages are processed in the SUBCHECK queue & then move to realign queue to update the lookup tables
• -EXTRACT- messages come from REALIGN queue.This queue finally sends data to the outbound queues of assigned sites where realignment was triggered
• -EXTRACTBLK-contains message  created from replication objects of type bulk
• -AC_EXTRACT- contains messages created by site extract in Admin Console 

 

 
   

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