MapReduce Filter
MR job for Filter the records for tilte with keyword “night” O/P : Output record which has only records containg keyword "night" in title.
Job Chaining
Job Chaining: Filter records based on title for Job A and then take that output as input for Job B and filter again for title:
Join
Perform Join using MapReduce
Unique visitor count
Unique visitor count: logs (ipaddress, website).eg I/P => usera - google; usera - google ; userb - wiki ; usera - wiki O/P => google - 1; wiki - 2
Join using distributed cache
Perform a join on two tables using a distributed cache approach.
Temperature Exercise
To find the Maximum temperature for the years from the weather data set. I/P (Example) => 1942 128 1 1940 136 1 1956 124 1 1946 128 1 1940 136 1 1956 154 1 1942 138 1 1940 116 1 1954 124 1 1942 128 1 1945 152 1 1956 124 1 1941 111 1 1940 136 1 1961 164 1
O/P => 1940 136 1941 111 1942 138 1945 152 1946 128 1954 124 1956 154 1961 164
Temperature Exercise checks with real data
To find the Maximum temperature for the years from the weather data set. I/P (Example) => 1853 21.2 1854 21.7 1855 22.8 1856 22.7 1857 22.8 1858 23.6 1859 25.1 1860 19.3 1861 21.6 1862 20.0 1863 21.8 1864 22.8 1865 22.3 1866 21.9 1867 21.5 1868 25.8 1869 24.1 1870 24.9 1871 23.8 1872 23.7 1873 22.6 1874 25.3 1875 21.9 1876 24.5 1877 22.2 1878 22.2 1879 18.7 1880 20.5 1881 22.7 1882 20.0 1883 21.0 1884 23.9 1885 22.7 1886 21.8