Method and device for storing and reading/writing composite document

Abstract

A method and device for storing and reading/writing a composite document are disclosed. The method includes: an initial storing area is pre-allocated for an inner controlling stream of the composite document and the initial storing area is continuous sectors or sector clusters; the inner controlling stream is stored in the initial storing area. The patches of a user data stream and the inner controlling stream in the composite document are reduced using the method or device. Correspondingly, pre-allocating storing area makes the probability of continuously storing the user data stream and the inner controlling stream in the composite document increased. The I/O can be optimized by introducing a strategy of reading cache and writing in a batch size, which can improve the efficiency of reading and writing.

Dependencies are inferred from the claim text.