hadoop-streaming

I have a lot of zip files that need to be processed by a C++ library. So I use C++ to write my hadoop streaming program. The program will read a zip file, unzip it, and process the extracted data. My problem is that: my mapper can't get the content of exactly one file. It usually gets something like 2.4 files or 3.2 files. Hadoop will send several files to my mapper but at least one of the file is partial. You know zip files can't be processed like this. Can I get exactly one file per map? I don't want to use file list as input and read it from my program because I want to have the advantage

I want to find out top website page visits based on user age group between 18 and 25. I have two files, one contains username, age and other file contains username, website name. Examples: users.txt John, 22 pages.txt John, google.com I have written the following in python, and it works as i expected in outside of hadoop. import os os.chdir("/home/pythonlab") #Top sites visited by users aged 18 to 25 #read the users file lines = open("users.txt") users = [ line.split(",") for line in lines] #user name, age (eg - john, 22) userlist = [ (u[0],int(u[1])) for u in users] #split the user name and