Background fsck

[Dan Melomedman]

Matthew Dillon wrote:
> 
> :Hi all,
> :this is the outline of how to implement a background fsck for DragonFly.
> :DR, this is somewhat more mature than what I wrote on Friday.
> :
> :Joerg
> 
> :The first alternative is using a journal for all meta-data updates. That's
> :what most Linux filesystems are doing. The advantage is almost no time
> :needed to bring a uncleanly unmounted filesystem back into a working state.
> :The disadvantage is a steady slow down for _all_ meta-data updates.
> 
>     This actually doesn't slow down meta-data updates all that much,
>     because the journal is linear it takes only one seek to update while
>     you might need hundreds of seeks to update the meta-data in its 
>     individual locations on the disk.
> 
>     This is really the best way to do it, I think.

I've read somewhere that it can actually speed some specific cases up.


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