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User-Agent: Mozilla/4.73 [en] (Windows NT 5.0; U)


Hi ,

    This is in reference to bug 29991. 
    In a program  open a file and jump to 2GB offset and insert a character  at that offset 
    and close the file. The ls -l command shows the file size to be 2GB but df -k command does not 
    show any change in the disk space allocation.In other words the space is not actually allocated. 

Reproducible: Always
Steps to Reproduce:
1.In a program open a file
2.Jump to 2GB offset and try writing a character to the file
3.Close the file
4. 	

Actual Results:  ls -l command shows the file size to be 2GB.
df -k however does not show that 2GB file size is allocated.


Expected Results:  
Question : 1)  How do I allocate 2GB of file size without actually writing 2GB of data to the file ? 
                2)  Do we have some file system tunning parameter so that when ever we jump to 2GB offset and write
                    a character - 2GB size file get allocated on the disk ?
                3)  The file system is trying to do some sort of optimization. I want to turn off this optimization. This is required
                     for database use.    . 

Regards 
Vaibhav Nalawade