On 09/26/2011 04:03 AM, Sreeram B S wrote:
Hi,
I am Sreeram. This question is related to NFS.
I have a typical scenario. Please assume that there are 3 machines M1,
M2, M3. Each of them are having directories /tmp/abc in them. All the
NFS permissions are set appropriately.
Now, a user mounts M2's /tmp/abc on M1's /tmp/abc by issuing mount
command on M1. Mount is successful.
Then the user mounts M3's /tmp/abc on M2's /tmp/abc by issuing mount
command on M2. Mount successful.
Now I would expect the contents of M3's /tmp/abc to be shown as output
of 'ls' issue on M1. But this is not happening. I am unable to
comprehend the reason. Could you please guide me?
What are you seeing instead? Are you seeing M2's contents on M1?
Did you try to change the order of the experiment? i.e First mount M3 on
M2 and then mount M2 on M1? Just curious to see if there is any change
in the behavior.
Thanks,
JV
According to me, the contents of M3 should have shown up in M1's 'ls'
command, because the /tmp/abc of M1 is nothing but a *live* reflection
of /tmp/abc of M2. So whatever changes are done to M2's /tmp/abc should
be reflected on M1. Here, M2's /tmp/abc is mounting M3's /tmp/abc and so
this change should be reflected on M1's /tmp/abc as well. But this isn't
happening.
Kindly suggest if I am incorrect in my understanding or usage.
The command I am using is:
On M1: mount -t nfs M2:/tmp/abc /tmp/abc
On M2: mount -t nfs M3:/tmp/abc /tmp/abc
Regards,
Sreeram
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