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What is the byte offset value in hadoop or java?

The am bit confused with this byte offset value in terms is considered as a card key in the Hasoop Map shortcut program. First, what is the byte offset value?

Secondly, please throw some indicators on how this happens, and how to view this byte offset value?

Thanks Raj

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key-value byte offset key keyvaluepair
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byte offset - the number of characters that exists, counting from the beginning of the line.

for example this line

what is byte offset?

will have a byte offset of 19. This is used as a key value in hadoop

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A byte offset is the number of bytes starting from zero. One character or space is usually one byte when it comes to Hadoop. But check this question if you want to know more: How many bits are in a character?

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Basically, the offset is an integer that is used to determine the distance (absolute address) with respect to the base address.

Suppose a text file with the following data

The world of computer science
Quantum computing

now the offset for the first line is 0, and the hadoop job entry will be <0, Computer Science World> for the second line, the offset will be <23, Quantum Computing>

whenever we pass a text file to hadoop. It internally calculates the byte offset.

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