Mixing
Combine File input format hadoop
I am using CombineFileInputFormat for map-reduce action to process small files (kb in size) and large files (hundreds of mb and some GB). I have MapReduce.input.fileinputformat.split.maxsize as 64 MB and setMaxSplitSize(67108864). when mappers start, this line is printed in syslog.
2018-12-29 10:26:10,138 INFO [main] org.apache.hadoop.mapred.MapTask: Processing split: Paths:
/input/file.csv-m-00002:0+908250,
/input/file_68171.txt-m-00000:0+36589,
/input/file_27138.txt-m-00000:0+62929,
/input/file_62783.txt-m-00000:0+77776,
/input/file_26540.txt-m-00001:0+50115,
/input/file_12282018.txt-m-00007:0+65766888,
/input/file_12282018.txt-m-00007:65766888+65766889.
Can someone explain above processing split? When I add these split total is more than split size.
I have some questions regading file splits
which value is used when CombineFileInputFormat is used mapreduce.input.fileinputformat.split.maxsize or setMaxSplitSize() from CombineFileInputFormat class?
how setMaxSplitSize() works for larger files size grater than maxSplitSize?
what is the difference between mapreduce.input.fileinputformat.split.maxsize and setMaxSplitSize()?
hadoop mapreduce hadoop-partitioning
asked Jan 2 at 21:05
jp1518jp1518
12
add a comment |
I am using CombineFileInputFormat for map-reduce action to process small files (kb in size) and large files (hundreds of mb and some GB). I have MapReduce.input.fileinputformat.split.maxsize as 64 MB and setMaxSplitSize(67108864). when mappers start, this line is printed in syslog.
2018-12-29 10:26:10,138 INFO [main] org.apache.hadoop.mapred.MapTask: Processing split: Paths:
/input/file.csv-m-00002:0+908250,
/input/file_68171.txt-m-00000:0+36589,
/input/file_27138.txt-m-00000:0+62929,
/input/file_62783.txt-m-00000:0+77776,
/input/file_26540.txt-m-00001:0+50115,
/input/file_12282018.txt-m-00007:0+65766888,
/input/file_12282018.txt-m-00007:65766888+65766889.
Can someone explain above processing split? When I add these split total is more than split size.
I have some questions regading file splits
which value is used when CombineFileInputFormat is used mapreduce.input.fileinputformat.split.maxsize or setMaxSplitSize() from CombineFileInputFormat class?
how setMaxSplitSize() works for larger files size grater than maxSplitSize?
what is the difference between mapreduce.input.fileinputformat.split.maxsize and setMaxSplitSize()?
hadoop mapreduce hadoop-partitioning
asked Jan 2 at 21:05
jp1518jp1518
12
add a comment |
I am using CombineFileInputFormat for map-reduce action to process small files (kb in size) and large files (hundreds of mb and some GB). I have MapReduce.input.fileinputformat.split.maxsize as 64 MB and setMaxSplitSize(67108864). when mappers start, this line is printed in syslog.
2018-12-29 10:26:10,138 INFO [main] org.apache.hadoop.mapred.MapTask: Processing split: Paths:
/input/file.csv-m-00002:0+908250,
/input/file_68171.txt-m-00000:0+36589,
/input/file_27138.txt-m-00000:0+62929,
/input/file_62783.txt-m-00000:0+77776,
/input/file_26540.txt-m-00001:0+50115,
/input/file_12282018.txt-m-00007:0+65766888,
/input/file_12282018.txt-m-00007:65766888+65766889.
Can someone explain above processing split? When I add these split total is more than split size.
I have some questions regading file splits
which value is used when CombineFileInputFormat is used mapreduce.input.fileinputformat.split.maxsize or setMaxSplitSize() from CombineFileInputFormat class?
how setMaxSplitSize() works for larger files size grater than maxSplitSize?
what is the difference between mapreduce.input.fileinputformat.split.maxsize and setMaxSplitSize()?
hadoop mapreduce hadoop-partitioning
asked Jan 2 at 21:05
jp1518jp1518
12
I am using CombineFileInputFormat for map-reduce action to process small files (kb in size) and large files (hundreds of mb and some GB). I have MapReduce.input.fileinputformat.split.maxsize as 64 MB and setMaxSplitSize(67108864). when mappers start, this line is printed in syslog.
2018-12-29 10:26:10,138 INFO [main] org.apache.hadoop.mapred.MapTask: Processing split: Paths:
/input/file.csv-m-00002:0+908250,
/input/file_68171.txt-m-00000:0+36589,
/input/file_27138.txt-m-00000:0+62929,
/input/file_62783.txt-m-00000:0+77776,
/input/file_26540.txt-m-00001:0+50115,
/input/file_12282018.txt-m-00007:0+65766888,
/input/file_12282018.txt-m-00007:65766888+65766889.
Can someone explain above processing split? When I add these split total is more than split size.
I have some questions regading file splits
which value is used when CombineFileInputFormat is used mapreduce.input.fileinputformat.split.maxsize or setMaxSplitSize() from CombineFileInputFormat class?
how setMaxSplitSize() works for larger files size grater than maxSplitSize?
what is the difference between mapreduce.input.fileinputformat.split.maxsize and setMaxSplitSize()?
hadoop mapreduce hadoop-partitioning
hadoop mapreduce hadoop-partitioning
asked Jan 2 at 21:05
jp1518jp1518
12
asked Jan 2 at 21:05
jp1518jp1518
12
edited Jan 2 at 22:21
jp1518
asked Jan 2 at 21:05
jp1518jp1518
12
asked Jan 2 at 21:05
jp1518jp1518
12
asked Jan 2 at 21:05
jp1518jp1518
12
12
add a comment |
add a comment |
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