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Database optimization

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sql How to distribute to different mysql, How to keep high availability

Data in multiple libraries , How to keep id Can not repeat

Landing is complicated

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mycat The sub database and sub table launched by Alibaba In addition, people in the community are maintaining , It has little to do with ALI

Improvement is slow , The promising thing is shardingsphere, The only top product of Apache

Quick version update , Able to handle all kinds of situations
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Tips io performance

vertical : Divided into different libraries
level , One table is divided into different tables , Piecemeal construction , Allocation policy

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Generally, take mold and slice
The double 11 usually needs to expand the database ,

Split by time stay oracle Yes
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Range slicing plus mold taking

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shardingsphere rely on

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snowflake uuid

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