| Health
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| | How can the load-balancer know which |
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| slaves are healthy? |
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| | Number of connections (or free slots) |
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| | Performance |
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| | Not behind on replication |
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| | Often, the decision is application specific |
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| | Load-balancers arent that smart |
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| | Build your own checks and let the load- |
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| balancer check your checks |
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