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                            保證數據存儲高可用的手段主要是數據備份和失效轉移機制

### NoSQL
NoSQL：NoSQL主要指非關系的、分布式的數據庫設計模式
NoSQL數據庫產品基本都放棄了關系型數據庫的兩大重要基礎：以關系代數為基礎的結構化查詢語言\(SQL\)和事務一致性保證\(ACID\)，而更關注高可用性和可伸縮性


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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