User`s guide

Run mapreduce on a Hadoop Cluster

6-63

meanDelay =

KeyValueDatastore with properties:

Files: {

' .../tmp/alafleur/tpc00621b1_4eef_4abc_8078_646aa916e7d9/part0.seq'

}

ReadSize: 1 key-value pairs

FileType: 'seq'

Read the result.

readall(meanDelay)

Key Value

__________________ ________

'MeanArrivalDelay' [7.1201]

Although for demonstration purposes this example uses a local data set, it is likely when

using Hadoop that your data set is stored in an HDFS™ file system. Likewise, you might

be required to store the mapreduce output in HDFS. For details about accessing HDFS

in MATLAB, see “Read from HDFS”.