ext3 Overhead

[Mike Fedyk]

Stephen C. Tweedie wrote:
> Hi,
> 
> On Thu, 2004-02-19 at 13:01, christian.braun at ch.abb.com wrote:
> 
> 
>>Well, as I said my CF card does wear-levelling, so that's not to worry 
>>about. Still, as you said, there is a difference in the number of write 
>>accesses between ext2 and ext3... I just need to know in what region that 
>>difference is... is it 3 times... or 30 times... or 300... or even more?
> 
> 
> For data, there's no difference --- unless you're in data=journal mode
> --- except for the fact that ext3 usually starts flushing stuff to disk
> earlier than ext2, which can mean that ext3 writes temporary data more
> often than ext2.  For metadata, I'd expect ext3 is at most twice the
> writes of ext2 in most circumstances, but it's not something I've ever
> measured.

That can be configured to 30sec in the source too.  Has the patch to 
make that a mount option made it into upstream?