Re: New filesystem for Linux

[Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>]

> > > I am fully aware the counters are effectively 48-bit.  If they were
> > > just 32-bit, you would likely have hit the problem yourself already.
> >
> > Given the seek time 0.01s, 31-bit value would last for minimum time of 248
> > days when doing only syncs and nothing else. 47-bit value will last for
> > reasonably long.
>
> So you can at most do one transaction per drive seek?  That would
> definitely solve the overflow case, but hardly sounds like a
> high-performance filesystem. :)

Really it can batch any number of modifications into one transaction 
(unless fsync or sync is called). Transaction is closed only on 
fsync/sync, if 2 minutes pass (can be adjusted) or when the disk runs out 
of space.

Mikulas

Mikulas

> Jörn
>
> --
> Data expands to fill the space available for storage.
> -- Parkinson's Law