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[Linux-cluster] Re: GFS, what's remaining

On Sun, Sep 04, 2005 at 10:33:44PM +0200, Pavel Machek wrote:
> > - read-only mount
> > - "specatator" mount (like ro but no journal allocated for the mount,
> >   no fencing needed for failed node that was mounted as specatator)
> I'd call it "real-read-only", and yes, that's very usefull
> mount. Could we get it for ext3, too?

	In OCFS2 we call readonly+journal+connected-to-cluster "soft
readonly".  We're a live node, other nodes know we exist, and we can
flush pending transactions during the rw->ro transition.  In addition,
we can allow a ro->rw transition.
	The no-journal+no-cluster-connection mode we call "hard
readonly".  This is the mode you get when a device itself is readonly,
because you can't do *anything*.



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Joel Becker
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E-mail: joel becker oracle com
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