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by zokier
854 days ago
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> Replication is supposed to handle your more hairy operational concerns. What’s the problem? Replication is slow, and requires each node to have lot of resources, and generally prefers nodes to be realtively homogenous. But for non-trivial applications replicating the whole application (or some shard of it) to all nodes is simply impractical, and it is useful to be able to scale and adjust different parts of system independently. For example on AWS Lambda you can scale out up to 1000 new instances per 10 seconds (and scale in at similar rate). Can you imagine any DMBS replication working very effectively at such circumstances? |
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