[OpenAFS] Migrating existing data onto vice partition on the fly
Tue, 30 Dec 2014 17:57:43 +0100
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Am Dienstag 30 Dezember 2014, 17:33:44 schrieb Levente Peres:
> > Why same server? An AFS setup usually consists of several servers,
> > especially if you want to serve terabytes of data. Not to mention =
> > needed kerberos server.
> Same server because I need the transfer to be quick. Once I start - I=
> need to do the migration in max 1-2 hrs... tops. I know... I know...
Copy over some terabites of data in 1-2 hours? That's challenging. AFS =
network filesystem, and your data will need to go through the cache man=
anyway. That means you MUST run the AFS client AND server on this same =
while it still serves the data from the old location.
Still, what about the kerberos setup? Do you have one already? If not, =
have to set it up, too (before setting up AFS).
> >> Unfortunately, I have only this "one" partition remotely big enoug=
> >> hold the data and/or fast enough to handle in a reasonable amount =
> >> time.
> > Fast enough for what? To copy over the data or to serve it afterwar=
> Both I guess but that's not the main issue, first problem is migratin=
> it in a very short time. So I need to do it the ugly way, within the
> same server... I don't have 8Gb switches or the like and storage fabr=
> etc to assist me in this externally... simple "work with what you got=
But you have rsync at your service. You can use it to copy most of the =
over in the background. You can even do several iterations and then do =
last iterations after ensuring that the data can't be modified anymore.=
And that's where you'll get into trouble. You can't mount it ro since i=
also your /vicepa partition. If you serve it via NFS currently, you cou=
export it ro, though.
Dirk Heinrichs <firstname.lastname@example.org>
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