Date: Tue, 24 Aug 1999 16:13:09 -0700 From: mikel@zso.dec.com (Mike Lempriere) To: tlambert@primenet.com Cc: dg@root.com, freebsd-alpha@FreeBSD.ORG Subject: Re: Clustering? Message-ID: <9908242313.AA02399@slugbt.zso.dec.com> In-Reply-To: <199908241955.MAA01709@usr09.primenet.com> (message from Terry Lambert on Tue, 24 Aug 1999 19:55:36 %2B0000 (GMT))
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Ok, thanks for the info. > From: Terry Lambert <tlambert@primenet.com> > Subject: Re: Clustering? > To: dg@root.com > Date: Tue, 24 Aug 1999 19:55:36 +0000 (GMT) > Cc: mikel@zso.dec.com, freebsd-alpha@FreeBSD.ORG > > > >These pairs are tied together with differential SCSI bus to shared storage > > >for "clustering". Specifically, they were used for NT "Wolfpack". > > > > > >Does anyone know if FreeBSD already has the smarts to handle this sort of > > >configuration, or would I be having write device drivers to make use of > > >it? > > You might have to write the drivers. If you can get hardware docs > along with the machines that would be a good thing to do, in any > case. > > > > >Can you see any reason I should not try to acquire this equipment? I > > >could skip the shared storage, differential SCSI, etc. and save some money > > >if it's known the FreeBSD would not like it. > > > > > >Please reply to me directly ('though I am on the list) as the rest of the > > >list probably won't be interested. > > > > FreeBSD doesn't support shared filesystems. You would need to add support > > for that into FFS and presumably get or implement a distributed lock manager. > > The David Sarnoff stuff supports this. It would not be too > difficult to hack up the disctubted memory coherency manager > to use low level SCSI I/O primitives to support this. > > Also, SGI continues to threaten to release XFS sources, which are > capable of supporting this kind of configuration (the biggest issue > there is the same as on NT, since NTFS has a single log lock per > volume, and XFS has a single journal lock per volume). > > > Terry Lambert > terry@lambert.org > --- > Any opinions in this posting are my own and not those of my present > or previous employers. > > > -- *** Due to layoffs, I will lose my old zso.dec.com address as of *** *** 07-Sep-1999. Please update your address book entry for me. *** Pacific NorthWest wine, blues, jazz info; http://vintners.net/~mikel Mike Lempriere-Home: mikel@vintners.net WA State resident-junk email prohibited by law: RCW19.190 & RCW19.86 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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