Problem with NFS

[zaxxon]

Hello,

all 3 boxes are AIX 4.3.3 boxes.
Host A has a NFS share which is mounted by Host B. No problems occure so far.
Now this share on Host A becomes a NFS share itself, shared from Host C, because the local disks were getting full and having space shared via NFS from a 3rd box is the fastest way to get us more space.
Host B can't mount the shared NFS share via NFS anymore now. I get following error:

mount: 1831-008 giving up on:
srdbhv03:/mnt/srarhv01/test
vmount: A file, file system or message queue is no longer available.

showmount -e shows everything exported correct; the /etc/exports allows -root and -access to the host, that gets the error message when I try to mount from it.
I desperately put the hostname in the -root and -access of the exports of both sharing machines, to no new effect. I got the same error.

To make it a bit more clear and prevent misunderstandings:

#1:

+--------+  NFS Share  +--------+
| Host A |------------>| Host B |
+--------+   WORKS!    +--------+

#2:

+--------+  NFS Share  +--------+  NFS Share  +--------+
| Host C |------------>| Host A |------------>| Host B |    
+--------+   WORKS!    +--------+   ERROR!    +--------+

Or maybe is it possible that you can't export and mount a FS to/on a 3rd host, which is already a NFS mount from another host?

Thanks for help in advance.

laters
zaxxon

 

[zaxxon]

Just tried it with a softlink on the directory, didn't work. Same error message...

laters
zaxxon

 

[khalidaaa]

waw, your problem is juicy it my first time to think of this

Well, I have always thought that the NFS can be done as one server and many clients. Never came into a case where i had to nest the NFSs.

Why don't you do it directly between Host C and Host B? Why do you still want to involve host A in?

+--------+  NFS Share  +--------+
| Host C |------------>| Host B |
+--------+ Should WORK!+--------+

Regards
Khalid

 

[zaxxon]

I can't do this because Host B stands for a lot of Windows PC, which got NFS Clients installed. I don't want to configure them all against the other machine.

laters
zaxxon

 

[khalidaaa]

I think in your previous comment, you meant that Host A stands for alot of Windows PCs right? coz if it was B, you won't need to change any thing on the clients NFS as they all point to B while you will change the NFS on B to point C!

any way, i will try to implement your case today in my spare time and let you know my findings

Regards,
Khalid

 

[zaxxon]

No, it is Host B that stands for a lot of NFS-PC clients. Yes, I would not have to change anything, if it would work hehe. I would have to change all Clients, if I would make Host C the one sharing for A and B, which would prevent a chained export and mount of a NFS resource.

Anyway, as I still don't think that it will work maybe cause of problems of handling the file locks for the NFS server or something, I was lucky to just draw the needed disks out of Host C and put them into Host A

Thanks for thinking about it ^^

laters
zaxxon