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Re: Question on copying files to AWS


From: Rob Sargent
Subject: Re: Question on copying files to AWS
Date: Sun, 18 Nov 2018 14:31:46 -0700

You might pipe ls -R into that command but you’ll want access to multiple machines to run a slew of parallel cp jobs. GNU parallel can use a hosts file to start remote jobs. Each of those jobs needs a supply of files to copy

On Nov 16, 2018, at 12:13 PM, Michael A Nesmith <address@hidden> wrote:

Hi, everyone,


I am new to both AWS and GNU Parallel software.


Please pardon a beginner's questions.


I need to copy/move files from my AWS Linux EC2 instance (Redhat 6.10) to an S3 bucket that was previously created.


Normally the command to copy a file (for example, messages) would look like this:


     aws s3 cp messages s3://hhs-cms-epl-epor-stg-predev-v3 


To verify the file is in the S3 bucket, I use the command:


     aws s3 ls hhs-cms-epl-epor-stg-predev-v3 | grep messages


The problem is that I need to upload a lot of files (100,000 or so) and some of them are quite big (1 GB to 5 GB), and it takes a long time to upload so many files or very big ones.

I need to speed this process up.


The questions are:


1) Would GNU parallel software speed up this copy process significantly?


2) What is the syntax of the command when using S3 buckets?



If I understand the man page and the beginner youtube page, to use the parallel option one should use something similar to:


     parallel aws s3 cp messages s3://hhs-cms-epl-epor-stg-predev-v3


However the output I get is:


# parallel aws s3 cp messages s3://hhs-cms-epl-epor-stg-predev-v3
parallel: Warning: Input is read from the terminal. You either know what you
parallel: Warning: are doing (in which case: YOU ARE AWESOME!) or you forgot
parallel: Warning: ::: or :::: or to pipe data into parallel. If so
parallel: Warning: consider going through the tutorial: man parallel_tutorial
parallel: Warning: Press CTRL-D to exit.
address@hidden tmp2]#

The file does not copy.


Any advice on how to do this properly?


Thank you in advance to any who have time to help.


Yours,

Mike




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Michael A. NeSmith  AWS UNIX Cloud Administrator

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