Database Reference
In-Depth Information
Table 8-3. Streaming separator properties
Property name
Type
Default
value
Description
The separator to use when passing the input key
and value strings to the stream map process as a
stream of bytes
stream.map.input.field.separator
String \t
The separator to use when splitting the output
from the stream map process into key and value
strings for the map output
stream.map.output.field.separator
String \t
The number of fields separated by
stream.map.output.field.separator
to
treat as the map output key
stream.num.map.output.key.fields
int
1
The separator to use when passing the input key
and value strings to the stream reduce process as
a stream of bytes
stream.reduce.input.field.separator String \t
The separator to use when splitting the output
from the stream reduce process into key and
value strings for the final reduce output
stream.reduce.output.field.separator String \t
The number of fields separated by
stream.reduce.output.field.separator
to treat as the reduce output key
stream.num.reduce.output.key.fields int
1
Figure 8-1. Where separators are used in a Streaming MapReduce job
