Re: Linux 2.6.29

[Jeff Garzik]

David Rees wrote:
> Either way - forcing the data to be synced to disk a couple times
> every second is a hack and causes fragmentation in filesystems without
> delayed allocation.  Fragmentation really goes up if you are recording
> multiple shows at once.

Check out posix_fallocate(3).  Not appropriate for every situation, 
might eat additional disk bandwidth...

But if you are looking to combat fragmentation, pre-allocation (manual 
or kernel-assisted) is a relevant technique.  Plus, overwriting existing 
data blocks is a LOT cheaper than appending to a file.  fsync's more 
quickly to disk, too.

	Jeff


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