Adaptive Data Reduction Scheme for SSD-based Host-side Caches in VDI Storage

Because of the outstanding performance of SSD, it has been deployed in storage system large-scaly. However, the limited lifespan of SSDs has always been the critical shortcoming holding back the footsteps of SSD popularization. We will propose an adaptive data reduction strategy for SSD-based caches in virtualized environment, which can expand the lifespan and capacity of SSD. The adaptive data reduction for SSD-based host-side caches involves both deduplication and delta compression to achieve considerable data reduction efficiency with limited resources. To further accelerate the process, a double bloom filter is applied to pre-process the written data. The experimental results demonstrate this strategy can significantly reduce redundancy, enhance the utilization of SSDs and reduce the data transmission between hosts and the storage pool, further improve the performance of the storage system.