Thanks Denis, for your quick response.

 

My original file is not compressed. It is just a text log file.

 

Regards

Rohit Kumar Prusty

+91-9884070075

 

From: Denis Bolshakov [mailto:bolshakov.denis@gmail.com]
Sent: Monday, August 29, 2016 9:03 PM
To: Rohit Kumar Prusty <Rohit_Prusty@infosys.com>
Cc: user@spark.apache.org
Subject: Re: After calling persist, why the size in sparkui is not matching with the actual file size

 

Hello,

 

Spark uses snappy by default, is your original file compressed?

Also it keeps data in own representation format (column base), and it's not the same as text.

 

Best regards,

Denis 

 

On 29 August 2016 at 16:52, Rohit Kumar Prusty <Rohit_Prusty@infosys.com> wrote:

Hi Team,

I am new to spark and have this basic question. After calling persist, why the size in sparkui is not matching with the actual file size?

 

Actaul File Size for “/user/rohit_prusty/application2.log” – 39 KB

 

Code snippet:

===========

logData = sc.textFile("/user/rohit_prusty/application2.log")

logData.persist()

logData.count()

errors = logData.filter(lambda line: "ERROR" in line)

errors.persist()

errors.count()

 

Output in SparkUI

==============

logData RDD takes 2.1 KB

errors RDD takes 1.3 KB

 

Regards

Rohit Kumar Prusty

+91-9884070075

 



 

--

//with Best Regards
--Denis Bolshakov
e-mail: bolshakov.denis@gmail.com