[OpenAFS] bets practices on WAN

Frank Burkhardt fbo2@gmx.net
Thu, 2 Feb 2006 14:26:16 +0100


On Wed, Feb 01, 2006 at 11:52:56AM -0500, Wes Chow wrote:
> Our site has machines in three geographically distant areas.  Right now,
> we have one kdc and openafs vldb server in each location, the rationale
> being that in case of network disconnections, each location would still
> be able to access its local services.  Does this seem like reasonable setup?
> Do clients prefer using vldbs that are on the same subnet, like how they
> prefer RO volumes?  Every client has entries for every vldb in the
> CellServDB file.. sometimes, when there's a short period of network
> disconnect with the remote vldbs, it seems like clients hang while
> trying to access those servers, despite the local vldb still being
> available.  Is this possible?  If so, is it recommended to remove remote
> vldbs from client CellServDB files?

Use 'fs setservreprefs -vlservers ...' to make each client prefer the local
VLDB (lower the pref-value on the local VLDB below all others). From this
time on, the client will only ask the local VLDB with fallback to remote
ones (when the local VLDB becomes unavailable).