Abstract
Nowadays, the technology and concept of Web 2.0 have been widely applied, which injects vigor into many traditional web applications. And in vertical social networking services exist many content data, which is one kind of the unstructured data.[ The purpose of the snapshot replication algorithm proposed in the paper is to solve the problem of data inconsistency [in the storage of unstructured data and keep a good balance among capacity, velocity and availability. The experiments show that snapshot replication algorithm combined with replication when referenced algorithm and hard link optimization could perform very well in capacity, velocity and availability.
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