Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!super!mjt From: mjt@super.ORG (Michael J. Tighe) Newsgroups: comp.unix.wizards Subject: Re: Cray I/O (was: Re: What kinds of things) Message-ID: <9851@super.ORG> Date: 4 Jun 89 14:50:41 GMT References: <106326@sun.Eng.Sun.COM> <422@ladcgw.ladc.bull.com> <13688@ncoast.ORG> <4609@alvin.mcnc.org> <424@ladcgw.ladc.bull.com> <4616@alvin.mcnc.org> <16618@rpp386.Dallas.TX.US> Sender: news@super.ORG Reply-To: mjt@super.UUCP (Michael J. Tighe) Distribution: na Organization: Supercomputing Research Center, Lanham, Md. Lines: 12 In article <16618@rpp386.Dallas.TX.US> jfh@rpp386.cactus.org (John F. Haugh II) writes: > I have also heard that the overhead of sending single character I/O > requests over the hyperchannel was extremely costly. Yes it is inefficient. Hyperchannel was designed for bulk transfers, not character oriented I/O. Therefore you run into lot of problems, such as sporadic output and delays between keystrokes. -- ------------- Michael Tighe internet: mjt@super.org uunet: ...!uunet!super!mjt