6DEAN J, GHEMAWAT S. Distributed programming with mapreduce [M]. Sebastopol, CA: O'Reilly Media, Inc., 2007:371-384.
7CHANG F, DEAN J, GHEMAWAT S, et al. Bigtable: a distributed storage system for structured data [ C 1/! Proc of the 7th USENIX Symposium on Operating Systems Design and Implementation. 2006: 205-218.