[Lustre-discuss] 1.6.4.2 -> 1.8.0.1 Upgrade Question

[Charles Taylor]

Thanks Brian, but I'm still a little unsure of the tunefs step in the  
upgrade.    Is it actually necessary as part of the MDS upgrade?  Is  
it safe and do we do the same when upgrading the OSSs i.e. do we have  
to run tunefs.lustre on each OST or just the MDT?

Thanks,

Charlie Taylor
UF HPC Center

On Jul 23, 2009, at 9:47 AM, Brian J. Murrell wrote:

> Charles,
>
> I have opened bug 20246 to have that section of the manual reviewed.
>
> Thanx for pointing that out.
>
> b.
>
>
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> We are about to upgrade our standalone MGS/MDS (no failover) from  
> 1.6.4.2 to 1.8.0.1.    I'm a little confused by section 13.2.4 of  
> the Lustre 1.8 Operations Manual.     What is the purpose of the
>
> mdt1# tunefs.lustre --mgs --mdt --fsname=testfs /dev/sda1
>
> command?    I assume it is writing this information to the MDT (/dev/ 
> sda1) but wan't that information alright put there when the file  
> system was created under 1.6.4.2?    Has the format changed between  
> the two versions?    Why is the tunefs.lustre step necessary?    I'm  
> concerned about overwriting *anything* on the MDT and rendering our  
> file system unusable.   I just want to be sure we understand what we  
> are doing.
>
> The paragraph labeled "Description" in section 32.2 (describing  
> tunefs.lustre) did not exactly give me a warm-fuzzy.
>
> BTW, we already have a number of 1.8.0.1 clients running against the  
> 1.6.4.2 servers.     Working great so far!
>
> Thanks,
>
> Charlie Taylor
> UF HPC Center

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