2007/416 NFSv4 Mirror-mounts

[Calum Mackay]

Bill Sommerfeld wrote:
> Is there a server-side change associated with this project or is it
> entirely a client-side feature?

entirely client-side; apols if that wasn't clear.

I also failed to note that mirror-mounts should work with any vendor's 
NFSv4 server implementation.

>> Recursive manual hierarchical unmounting
>>
>> If an NFS filesystem is manually unmounted, then any mirror-mounted
>> filesystems contained within it will also be unmounted, if idle. If
>> there is an active mirror-mounted filesystem within, the manual unmount
>> will fail, as though that original filesystem were busy. A forced
>> unmount will, however, be propagated through to all enclosed
>> mirror-mounted filesystems.
> 
> this seems odd to me -- is there some reason the unforced unmount can't
> always recurse into the enclosed mirror mountpoints?

but if they're active - busy - then we shouldn't allow them to be 
unmounted, surely? Just as if the enclosing mount were busy, we would 
fail that unmount.

or am I missing your point, Bill?

cheers,
c.