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Re: [Linux-cluster] Tests to demonstrate Red Hat Cluster Behaviour



Scott,

Not sure if it works with GFS (I would assume so, but I don't have it
installed to test)  But normally you would run the following to remount
an already mounted filesystem in read only mode:
mount -o remount,ro <mountpoint>

And conversely to remount read-write:
mount -o remount,rw <mountpoint>

Thanks, 
Eric

On Mon, 2007-11-26 at 14:05 -0800, Scott Becker wrote:
> I had a failure once where the kernel detected an inconsistency in the
> file system and mounted it read only. I'm interested in testing this
> but am not sure if/how I can remount read only a write mounted
> filesystem.
> 
>     scottb
> 
> Ferry Harmusial wrote: 
> > Hi Everybody,
> > 
> > I'm looking for tests that demonstrate the characteristics of Red
> > Hat Cluster Behaviour.
> > So far, I came up with the following things myself:
> > 
> > normal operation:
> > 
> > 1 Reboot node2
> > 2 Reboot node1 
> > 3 Halt node2
> > 4 Halt node1    
> > 5 Boot node2
> > 6 Boot node1    
> > 
> > hardware failures
> > 
> > 7 On the node on which the cluster service is started:
> >    • Pull out first ethernet cable of the traffic bond
> >    • Wait for three minutes
> >    • Pull out second Ethernet cable of the traffic bond
> > 8 On the node on which the cluster service is started:
> >    • Pull out first ethernet cable of the cluster interconnect bond
> >    • Wait for three minutes 
> >    • Pull out second Ethernet cable of the cluster interconnect bond
> > 9 On the node on which the cluster service is started:
> >    • Pull out the SCSI cable
> > 10 On the node on which the cluster service is started: 
> >    • Pull out the power cords
> > 
> > software failures
> > 
> > 11 On the node on which the cluster service is started:
> >    • Change the cluster service init script so 'status' always
> > returns '1' (failure)
> > 
> > I'm interested in what you use your self ... 
> > 
> > Thanks in advance,
> > 
> > Ferry
> > 
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> > 
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