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file size changed after SCP


 
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# 1  
Old 02-07-2008
file size changed after SCP

Hi All,

I am having a scriptin that the SCP command is performed . The scp is transfering one file from one location to other.

But after SCP i see the file size is changed from original size . What might be the reason.

Thanks in advance,
Arunkumar
# 2  
Old 02-07-2008
scp won't modify file content, like adding headers for example. Double check file sizes on both sides, and run md5sum check against both files.
# 3  
Old 02-07-2008
I am having the status file which shows the size of source file . But he actual source file is removed .

I am not able to compare these two files Smilie
# 4  
Old 02-07-2008
if transmitted in ascii mode, then it may be the conversion of end-of-line characters from one type system to another.

if transmitted in binary, should be the same size.
# 5  
Old 02-07-2008
Quote:
Originally Posted by arunkumar_mca
I am having the status file which shows the size of source file . But he actual source file is removed .

I am not able to compare these two files Smilie
Well transmit another file, preferably something with a checksum before and after. This should not be happening, its like world crumbling bad news.
# 6  
Old 02-07-2008
Not too much info here. Smilie We need to know how big the source file was and how big the destination files was. And we need to know exactly how you obtained what you think is the file size. I think the most probable answer is that you have a bug your script. Even if your script transfered the file correctly, deleting the source file and then checking to see if the destination file is ok seems backwards.

If the file sizes really are different, I would expect the destination file to be smaller. This would mean that the transfer did not complete and would probably be caused by one of the boxes involved in the transfer rebooting or something like that. Or maybe you ran out of disk space. Stuff like this is the only way I have scp partially transfer a file but ultimately fail.

Also, files have two sizes: how much data is stored and how much disk space was used to store it. Minor changes in the second metric can be caused by using differing file systems. A one byte file could consume 4k of disk space on one box but only 1k of disk space on another. This does not indicate a problem in the transfer. This is why we need to know what numbers you are comparing.
# 7  
Old 02-08-2008
Thanks all ..

Please find the information below

*) I am transfering the file from UNIX to LINUX

This is the output of BDF command when i run it . SO it is having more space

lnx102:sndus:load>) bdf .
Filesystem 1K-blocks Used Available Use% Mounted on
10.8.7.20:/vol/prod/sf_buffer
1258291200 6111328 1252179872 1% /sf/buffer


The size of source file that i am trying to transfer is
164283776 in unix

The file that trasfered to linux is with size
11928673


I found the wc -l of the transfered file and the total line transfered is 187311
lines .
I have taken the 187311 from source file and comapred the lined all are one and same but the file is not transfered completely .

What might be the possible reason ?..

Thanks,
Arun
 

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