A Novel Storage Management in Embedded Environment
Flash memory has been widely used in various embedded devices, such as digital cameras and smart cell phones, because it has a fast access speed, a high availability and an economization of power. However, replacing hard drives with flash memory in current systems often either requires major file system changes or causes performance degradation due to the limitations of block based interface and out-of-place updates required by flash. We introduce a management framework of object-based storage system which can optimize the performance for the underlying implementation. Based on this model, we propose a data allocation method that takes richer information from an object-based interface. Using simulation, we show that cleaning overhead can be reduced by up to 11% by separating data and metadata. Segregating the hot data and cold data can further reduce the cleaning overhead by up to 19%.
KeywordsFlash memory Object-based flash file system Data allocation
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