Re: Performance of ext3 on large systems

[John Bradford]

> > Well, yes, but that's not what I was saying - what was saying is that
> > if you are primarily reading anyway, there isn't much to be gained
> > from using EXT-3, over EXT-2.
> 
>   Besides of data robustness.

Well yes, but that only matters if the filesystem isn't unmounted
cleanly.

> > If you are primarily writing, EXT-3 atime should be faster than EXT-2
> > noatime.  EXT-3 notime will obviously be even faster.
> 
>   No.  For primarily writing the 'noatime' effect disappears in background
>   noice. Every time you write into file, mtime will be updated, and also
>   ctime.  Only one of i-node timestamps _not_ updated is atime...

Well, that's what I was implying, that for primarily writing, EXT-3
should be better than EXT-2, regardless of the atime configuration.

So, we agree :-).

John.