script to fill up disk space for testing purpose

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# 1  
Old 10-14-2009
script to fill up disk space for testing purpose

Hello everyone
I am new to this forum

I am working on a project and needed a test script to fill up a disk partition /tmp/data to see how the program fails.
The system I am working on is a redhat 5.3.
Is there anything out there?

# 2  
Old 10-14-2009
We've posted the answer to this one several times- please use our search.
# 3  
Old 10-14-2009
I tried some search, nothing in particular came up.
If you have a pointer, let me know. Many thx
# 4  
Old 10-14-2009
Be careful that /tmp/data is a mountpoint under /tmp. You don't want to fill /tmp itself on a running system because system commands can fail.
One simple way of creating a file which grows rapidly:
yes > filename

# 5  
Old 10-14-2009
Yes I understand that if /tmp is full it could bring the system down to its knee but this is a control test environment so that shouldn't be an issue. I can always remove those files.

what i need is a script which will find out how much space is available on /tmp/data like df -h /tmp/data and then go ahead and fill it up with some file say filler to about 95% full or have less than 1.5GB available. thx
# 6  
Old 10-14-2009
On a linux system, you can mount a small loopback file system under /tmp/data to simulate the shortage of space.
# 7  
Old 10-15-2009
that sounds like an option to use. tell me more about loopback file system. thx
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