Alibaba Group Holding Limited
EFFICIENT COMPACTION ON LOG-STRUCTURED DISTRIBUTED FILE SYSTEM USING ERASURE CODING FOR RESOURCE CONSUMPTION REDUCTION

Abstract:

One embodiment described herein provides a system and method for data compaction in a storage system comprising a plurality of storage nodes. During operation, in response to determining that data compaction is triggered, the system regroups valid data from a first set of data chunks stored in the storage system into a second set of data chunks such that a respective data chunk from the second set of data chunks comprises contiguous valid data slices. The system further performs error-correction-coding protection on the second set of data chunks. A physical location associated with a respective valid data slice remains unchanged subsequent to the error-correction-coding protection.