Christopher Mason wrote: > > Has anyone out there who's attempted to use Samba CTDB (clustered > trivial database) to provide redundancy for serving of AFS volumes via SMB? > > Are there issues in terms of the semantics Samba CTDB expects from a > filesystem versus what AFS provides?
I have not used Samba CTDB but from what little I know, CTDB provides a distributed database which is used to maintain shared state information so that locks and file handles can be served from any machine the client communicates with. Samba is going to want to serve byte range locks which are not supported by AFS. This is why the Windows AFS clients contain a mapping from CIFS lock semantics to AFS semantics. This will not be provided by Samba. AFS of course will also require the Samba servers to have AFS tokens for each user if you are providing authenticated access. If so, those tokens will either have to be replicated across the cluster or obtained on demand. Again, I do not know if the Samba folks have provided any AFS specific functionality in this area. Jeffrey Altman
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