[OpenAFS] Restore primary from replica server
Wed, 11 Jul 2007 12:35:44 -0600
AFS doesn't require a 'primary server' nor does it require segregation
of RW volumes and RO volumes.
It will help to know what makes a server your 'primary.'
That being said, some sites do consider a specific AFS file server to be
their 'primary.' This may be for non-AFS reasons. For example, some
sites have kept RW data on beefier (faster/higher availability/whatever)
hardware, and want all RWs kept on that hardware. If for this or some
other reason you've segregated RW volumes from RO, by all means restore
to your 'primary.'
In general a volume can be restored to any server/partition with
There are different types of restores. Two that come to mind are
'restore to replace corrupted volume' and 'restore to retrieve file I
just mangled beyond hope.'
To replace a corrupted volume I can restore over an existing volume
(overwrite in place using the same volume name and location) if I so
choose -- this is generally easier because I don't have to remove the
corrupted volume and don't have to finagle the VLDB entry, and won't
get complaints that "a volume of this name already exists," etc.
I can restore without overwriting existing volume, for example to
retrieve some subset of files/directories from time X. (different name,
location as convenient.)
As for being 'standard' to restore data to the primary? I don't, others
I never taught this as best or even recommended practice when teaching
for Transarc/IBM or later when teaching my own classes, but your
hardware configuration or some other factor may make it relevant to your
Jeff Greer wrote:
> Is it standard to restore data to the primary AFS server from a read
> only replica server?
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