[Lustre-discuss] 1.6.3 -> 1.6.4.2 upgrade

[Charles Taylor]

Just updated a single client from 1.6.3 to 1.6.4.2.    The  
documentation seems to indicate that an upgraded client should still  
be able to mount the file system from a non-upgraded MGSMDT.    The  
documentation appears to be referring to a 1.4 to 1.6 upgrade but I  
made the leap that similar things would apply to 1.6.3 -> 1.6.4.2.

As I said, the servers are still running 1.6.3 and have not been  
touched.    The client is upgraded to 1.6.4.2.   When I try to mount  
the file system I get...

Is the MGS specification correct?
Is the filesystem name correct?
If upgrading, is the copied client log valid? (see upgrade docs)

I've double-checked the first two but I have no idea what the third  
item refers to.    The docs doc about using tunefs to manually copy  
client config logs when upgrading an MGS/MDS but they seem to  
indicate that the only issue on the client one needs to worry about  
is the form of the mount command.   In going from 1.6.3 to 1.6.4.2,  
that should not be an issue.
Have I missed a step?   Do I need to do something to tell the MGS/MDS  
that the client has been upgraded?

Is there newer documentation for going from 1.6.3 to 1.6.4.2?    I  
was hoping that I could just upgrade the software on the MGS/MDS and  
OSS (in that order) and restart?    Is that not the case?

Thanks,

charlie taylor
uf hpc center