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))
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?9908242313.AA02399>