[OpenAFS] Migrating existing data onto vice partition on the fly

[Levente Peres]

Hello Jeff,

Thank you for answering.

I might have been a little obscure... I'll try to clear this up for you.

So... Right NOW I have a partition called /vicepa, which exists right
now, and has an XFS volume, which is used actively. It has some
terabytes of data and about 2.5 times of free space as the actual data.
This data has to be migrated within the same server to AFS.

Unfortunately, I have only this "one" partition remotely big enough to
hold the data and/or fast enough to handle in a reasonable amount of time.

My idea was based on the following: Somewhere I remember reading, that
it would be OK to have "AFS filesystem data" and "normal files" coexist
on the same partition for a while, if I watched carefully not to run out
of space. This may or may not be true - it was a long time.

So my original concept was that I would create the AFS filesystem on
"top" of the "existing data" on the /vicepa partition, then copy it over
to the cell's logical mount, then just delete the "old" data and have a
"pure" AFS partition left after.

Not sure I can be more clear, but I try if you ask.

Would this even work?

Best Regards,

Levente

On 12/30/2014 04:32 PM, Jeff Blaine wrote:
>> First I would set up the cell and everything, then just run a
>>
>> vos create -server athlas -partition /vicepa -name root.afs -cell
>> cellname -noauth
>>
>> ..right on top of the existing partition...
> Hmm? Describe this more. On top of what existing partition?
>
> But, ignoring that odd info above, all you have to do is:
>
>   rsync -va /my-xfs/data/ /afs/yourcell/huge-empty-volume
>
>                         ^
>                         |- trailing slash relevant, read rsync(1)
>
> If /my-xfs/data is writable space, you *must* to stop all writes to it
> (re-mount it read-only) and then run that command again to finalize
> things. This may or may not be "downtime" for you.
>