Sharding vs. Having multiple databases - Ayende @ Rahien
I was recently at a customer site, and he made a mention of sharding their database in a specific way, putting all of the user generated content on a separate server. I jumped in and told him that this isn't sharding. And then I had to explain, both to the customer and to myself, why splitting things up in that way bothered me.
The basic idea is the same, we want to split the information over several databases to reduce the load on each individual server, and get higher capacity. We'll use the Flickr model for this post. What the client suggested was:
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