Here is a short video that I created explaining the difference between Push and Pull replication.
In SQL Server, push and pull replication differ fundamentally in where the replication jobs are executed, impacting how data is synchronized between the publisher and subscribers. In push replication, the replication jobs—specifically the Distribution Agent—run on the publisher or the distributor (a separate server handling replication tasks). The publisher takes an active role, executing these jobs to push data updates to the subscribers based on a schedule or as changes occur. This centralizes the replication process, meaning the publisher or distributor manages the workload of tracking changes, packaging them, and delivering them to each subscriber. It’s an efficient model when the publisher is a robust server capable of handling the additional processing load and when subscribers need to receive updates without managing their own replication tasks.
Conversely, pull replication shifts the execution of replication jobs to the subscribers, where the Distribution Agent runs locally on each subscriber’s server. In this setup, subscribers take the initiative, running their own jobs to pull data from the publisher or distributor whenever they need updates. This decentralizes the process, reducing the publisher’s workload since it no longer has to actively manage data delivery for each subscriber. However, it places the responsibility on the subscribers to handle their replication tasks, which can increase their processing demands and require more configuration to ensure timely synchronization. The key distinction—jobs running on the publisher (push) versus the subscriber (pull)—drives the trade-offs between centralized control and distributed flexibility, making each suited to different network and operational scenarios.
Watch it on YouTube. https://youtu.be/ykHsAHH-ggs?si=Msr4jRgeygOs3_Gq
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