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badri-nair
Contributor
Contributor
‎2019-02-07 07:44 AM

Hadoop hdfs block size

I am unloading data from oracle database into Hadoop.

landing the file as as HDFS file. But the unloaded file is a single file 750 MB in size.

Can anyone please help me understand why its acting so. I would like to have each part file 128 MB in size.

where do i have to update the settings ?


Found 2 items
-rw-r--r-- 3 hdfs supergroup 0 2019-02-07 07:37 /var/lib/hadoop-hdfs/lake/itineraryitem2/_SUCCESS
-rw-r--r-- 3 hdfs supergroup 730087184 2019-02-07 07:37 /var/lib/hadoop-hdfs/lake/itineraryitem2/part-00000

 

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manodwhb
Champion II
Champion II
‎2019-02-07 07:53 AM

@badri-nair ,check below link will help you to understand.

https://www.talend.com/blog/2018/04/12/apache-spark-performance-and-tuning-blog/

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