请问 shuffle and sort in MapReduce这幅图出自哪里？

能不能分享一下这幅图所在的官方文档地址，谢谢
图片说明

http://hadoop.apache.org/docs/r1.0.4/cn/hdfs_design.html

出自hadoop的官方文档http://hadoop.apache.org/docs/stable/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredCommands.html