Re: [Rserpool] Re: Adler-32 Checksum

[Qiaobing Xie <Qiaobing.Xie at motorola.com>]

I too agree.

-Q

Randall Stewart wrote:

> Michael Tuexen wrote:
>
> > 32 bits are longer and therefore better, but the 16 bit algorithm is
> > - already described in RFC 1071
> > - supported on NICs in hardware.
> >
> > Since it might be difficult to use a NIC to do the computation,
> > because RSerPool normally will be implemented in userland,
> > I would also vote for the 32 bit version and describe the
> > algorithm explicitly in the ENRP ID.
> >
> > If others agree I can put some text in the ID.
>
>
> I agree :-D
>
> R
>
> > Best regards
> > Michael
> >
> > On Jun 28, 2005, at 15:59 Uhr, Thomas Dreibholz wrote:
> >
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > >
> > > On Tuesday 28 June 2005 15:53, Michael Tuexen wrote:
> > >
> > > > > I think, the Internet checksum algorithm (may be with keeping the
> > > > > full 32 bits
> > > > > instead of truncating to 16 bits) should already be sufficient for
> > > > > the audit
> > > > > purpose. Using this checksum algorithm, we also get order-
> > > > > invariancy and do
> > > > > not need to force a specific ordering of the handlespace within a
> > > > > management
> > > > > component. It is furthermore very simple and fast (only + and ~
> > > > > operations
> > > > > are needed, no *, / or %).
> > > >
> > > >
> > > >
> > > > So the Internet checksum is the way to go... I have no particular
> > > > preference
> > > > in 16 bit or 32 bit.
> > >
> > >
> > >
> > > I would prefer 32 bits. The checksum parameter pads the sum to 32 
> > > bits  of
> > > space anyway - so why not use the full 32 bits, making the 
> > > probability  that
> > > two states of the handlespace map to the same checksum value much  
> > > smaller?
> > >
> > >
> > > Best regards
> > > - --
> > > =======================================================================
> > >  Dipl.-Inform. Thomas Dreibholz
> > >
> > >  University of Essen,                            Room ES210
> > >  Inst. for Experimental Mathematics              Ellernstraße 29
> > >  Computer Networking Technology Group            D-45326 Essen/Germany
> > > -  
> > > -----------------------------------------------------------------------
> > >  E-Mail:     dreibh at exp-math.uni-essen.de
> > >  Homepage:   http://www.exp-math.uni-essen.de/~dreibh
> > > =======================================================================
> > > -----BEGIN PGP SIGNATURE-----
> > > Version: GnuPG v1.2.4 (GNU/Linux)
> > >
> > > iD8DBQFCwVfb32BbsHYPLWURAs2+AJ4y4dQidaFk8BluPiOCvfbSQG6WiACgpT9t
> > > F391kp60lLQnAatchlEmwgo=
> > > =3/5a
> > > -----END PGP SIGNATURE-----



_______________________________________________
rserpool mailing list
rserpool at ietf.org
https://www1.ietf.org/mailman/listinfo/rserpool