On Tuesday 14 June 2011 04:02:06 HuangAlex wrote:
> Hi,
>
> I know sequence number is the block allocation order, 

Correct
> but i am wonder does  the order of sequence number is also the creation time 
order of files? 

No.  File times are file properties and have nothing to do with when they were 
written to media.

 > I   know when yaffs perform gc, if that block contains useful object header 
it
> will copies it to a new block whcih has the currently largest sequence
> number, but the time for that header maybe very old.  Is that correct?

Yes this is correct.

Garbage collection is part of the internal workings of the file system. These 
should have absolutely no bearing on file state. It would be wrong for 
garbage collection to change the state of a file.

> Moreover, how does yaffs deal with cold and hot data? 

What do you mean by those terms? 

-- CHarles