FC3 strange lastlog size

[T. Horsnell]

>T. Horsnell wrote:
>> Hi all,
>> Can someone explain this please:
>> 
>> [root at ls1 log]$ ls -l /var/log/lastlog
>> -r--------  1 root root 1254130450140 May 13 16:41 /var/log/lastlog
>> [root at ls1 log]$ du -sk /var/log/lastlog
>> 48      /var/log/lastlog
>> 
>> I presume the 'ls' command output is wrong (1.2TBytes) but how do
>> I get the real length in bytes?
>
>They're both right. The file is 1254130450140 bytes long and is 
>occupying 48k of space on your disk. Excellent compression, eh?
>
>Google for "sparse files" (which is what this is) for an explanation.

Perfect. http://www.cs.wisc.edu/~thain/library/sparse.pdf reveals all.
Thanks,
T.

>
>Paul.
>
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