What are the agents in replication?

1.	What are the agents in replication?
Answer» SNAPSHOT Agent: Copy Schema+Data to snapshot folder on distributor. Used in all types of replication. Log reader Agent: Sends transactions from Publisher to Distributor. Used in transactional replication Distribution Agent: Applies Snapshots / Transactions to all subscribers’ runs at a distributor in PUSH and Runs at Subscriber in PULL. Used in transactional and transactional with updatable subscriptions. Queue reader Agent: Runs at distributor send back transactions from subscriber to publisher. Used in Transactional With updatable subscriptions. Merge Agent: Applies INITIAL snapshot to subscribers, from the next time SYNCHRONIZE by resolving the conflicts.

Answer»

SNAPSHOT Agent: Copy Schema+Data to snapshot folder on distributor. Used in all types of replication.
Log reader Agent: Sends transactions from Publisher to Distributor. Used in transactional replication
Distribution Agent: Applies Snapshots / Transactions to all subscribers’ runs at a distributor in PUSH and Runs at Subscriber in PULL. Used in transactional and transactional with updatable subscriptions.
Queue reader Agent: Runs at distributor send back transactions from subscriber to publisher. Used in Transactional With updatable subscriptions.
Merge Agent: Applies INITIAL snapshot to subscribers, from the next time SYNCHRONIZE by resolving the conflicts.

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