Re: [Tsvwg] checksum CRC reference
Qiaobing Xie <xieqb@cig.mot.com> Tue, 15 May 2001 20:22 UTC
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Date: Tue, 15 May 2001 15:18:24 -0500
From: Qiaobing Xie <xieqb@cig.mot.com>
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To: Lyndon Ong <lyndon_ong@eudoramail.com>
CC: sigtran@standards.nortelnetworks.com, tsvwg@ietf.org
Subject: Re: [Tsvwg] checksum CRC reference
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Lyndon, I think the checksum/CRC discussion is suffocating from too much information :-) IMO, what we desperately need now is some selection criteria (something like a requirement statement/document). Seemingly, nobody likes option/negotiation-based solutions. So we must make a selection. We know now that there are multiple checksum-based and CRC-based solutions to choose from. We know now that the implementation cost of each of the candidates varies widely and depends on different factors (e.g., 32bit-machine vs. 64bit-machine, software vs. hardware, big cache vs. small cache, etc). We know now that there are many different error models that can be used to evaluate the effectiveness of the candidates. We know now that none of the candidates is the clear winner in all the error-scenarios (the only thing seems sure is that CRC-based ones perform better than the sum-based ones). We know now that different application areas are looking for different level of transport data integrity checking. Whichever direction we take, we must keep in mind that SCTP is a general purpose transport and our final decision should be balanced and should not be biased towards any specific group of applications or platforms. regards, -Qiaobing Lyndon Ong wrote: > > Folks, > > For reference, David Black has passed a pointer to > http://ietf.org/internet-drafts/draft-sheinwald-iscsi-crc-00.txt for a good > discussion of CRC codes and their characteristics. > > I have to say, Doug's results were quite confusing, esp. where the Adler-32 > seemed to be performing much better than modified Adler. I did note that > CRC seemed to perform best... > > Cheers, > > L. Ong > > _______________________________________________ > tsvwg mailing list > tsvwg@ietf.org > http://www1.ietf.org/mailman/listinfo/tsvwg _______________________________________________ tsvwg mailing list tsvwg@ietf.org http://www1.ietf.org/mailman/listinfo/tsvwg
- [Tsvwg] checksum CRC reference Lyndon Ong
- RE: [Tsvwg] checksum CRC reference Douglas Otis
- Re: [Tsvwg] checksum CRC reference Qiaobing Xie
- Re: [Tsvwg] checksum CRC reference Randall R. Stewart