hadoopConf.set("mapreduce.job.inputformat.class",
"com.wizecommerce.utils.mapred.TextInputFormat");
hadoopConf.set("mapreduce.job.outputformat.class",
"com.wizecommerce.utils.mapred.TextOutputFormat");
No special settings required for reading Gzip except these above
I u want to output Gzip
hadoopConf.set("mapreduce.output.fileoutputformat.compress", "true");
hadoopConf.set("mapreduce.output.fileoutputformat.compress.codec",
"org.apache.hadoop.io.compress.GzipCodec");
Make sure Gzip codec is defined in core-site.xml
<!-- core-site.xml -->
<property>
<name>io.compression.codecs</name>
<value>org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.DefaultCodec</value>
</property>
I have a question
Why are u using GZIP as input to Map ? These are not splittable…Unless u have
to read multilines (like lines between a BEGIN and END block in a log file) and
send it as one record to the mapper
Also in Non-splitable Snappy Codec is better
Good Luck
sanjay
From: samir das mohapatra
<samir.help...@gmail.com<mailto:samir.help...@gmail.com>>
Reply-To: "user@hadoop.apache.org<mailto:user@hadoop.apache.org>"
<user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
Date: Tuesday, June 11, 2013 9:07 PM
To: "cdh-u...@cloudera.com<mailto:cdh-u...@cloudera.com>"
<cdh-u...@cloudera.com<mailto:cdh-u...@cloudera.com>>,
"user@hadoop.apache.org<mailto:user@hadoop.apache.org>"
<user@hadoop.apache.org<mailto:user@hadoop.apache.org>>,
"user-h...@hadoop.apache.org<mailto:user-h...@hadoop.apache.org>"
<user-h...@hadoop.apache.org<mailto:user-h...@hadoop.apache.org>>
Subject: Now give .gz file as input to the MAP
Hi All,
Did any one worked on, how to pass the .gz file as file input for
mapreduce job ?
Regards,
samir.
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