RE: JFFS3 & performance

Artem B. Bityuckiy
2004-12-22T16:46:24Z

On Wed, 22 Dec 2004, Joakim Tjernlund wrote:

> > On Wed, 22 Dec 2004, [iso-8859-1] Jörn Engel wrote:
> >
> > > On Wed, 22 December 2004 15:56:23 +0000, Artem B. Bityuckiy wrote:
> > > >
> > > > Preliminarily I'm planning:
> > > > 1. Use adler32 on headers
> > > > 2. Leave crc32 on data
> > >
> > > Why keep crc32?
> > This is just my IMHO: headers are small and the probability that serious
> > error appear there is lower that the probability of error on data. So it
> > seems we may reduce crc strength for them.
>
> Maybe, but it is the data CRC that costs. I don't think you will notice
> the difference if you just change the header CRC to Adler32.
True...
>
> >
> > In case of data - I just not sure if it is correct to use weaker
> > algorithm...
> > If somebody compitent may soundly explain why we may reduce CRC strength
> > there...
> >
> > Anyway, saing zlib not to add adler32 CRC is good idea and I think should
> > be done.
>
> Yes, that one is independant of what CRC algorithm we choose.
>
> Jocke
>
>

--
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.