[ SPAM? ] [OpenAFS] Read-only replication

[Lars Schimmer]

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Jaap Winius wrote:
> Hi folks,
>=20
> Here's a hypothetical question regarding the replication of AFS volumes=
:
>=20
> In an organization where it is only necessary for an administrator to
> either give users read-write access to volumes, or no access at all,
> what would be the advantage of creating any read-only replicas, beyond
> those for the standard volumes at the root of the AFS namespace?
>=20
> This subject is confusing to me, because I've learned that once a clien=
t
> has encountered a read-write mount point, it becomes biased towards
> accessing only read-write replicas beyond it, ignoring any and all
> perfectly usable read-only volumes that may be available.
>=20
> Of course, read-only replicas with hourly releases can be used as a
> safety net, allowing data to be more quickly recovered in the event of =
a
> failure, but if that's viewed as an unnecessary measure, then what othe=
r
> reasons reasons might there be for replicating any volumes?

Simple - Load Balancing. Imagine a cell at three countries hold together
by small ISDN lines - a RO copy local to each faculty and the have fast
access.

> Thanks,
>=20
> Jaap

MfG,
Lars Schimmer
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