Data storage method and device

Embodiments of the invention provide a data storage method and device. The method comprises the following steps of: obtaining target data; estimating calculation delays consumed by storing the target data according to different preset storage manners; obtaining an access frequency of the target data; when the access frequency is not lower than a first threshold value, determining the storage manner corresponding to the calculation delay with the minimum numerical value as a first target storage manner; otherwise, estimating a storage cost of each preset storage manner on the basis of the calculation delay of each preset storage manner and determining the storage manner corresponding to the storage cost with a minimum numerical value as the first target storage manner; and storing the target data according to the first target storage manner. Through the method and device provided by the invention, storage resources can be reasonably distributed for data. 本发明实施例提供了种数据存储方法及装置，所述方法包括：获得目标数据；估算所述目标数据按照预设的不同存储方式存储时