On Apr 30, 2007, at 4:56 PM, Jason Lin wrote:
That may not be an issue if all we need to do is query data on the
remote
server.
Even if only one system is doing updating, locks are an issue for (at
least) two reasons:
The first is that that a group's structure (or for dynamic files, the
hashing modulus) may appear to be invalid to a remote system that is
reading an NFS mounted file that is concurrently being modified by
the system that "owns" the file.
A more dangerous problem may occur with dynamic files because
information from the file header is cached when a dynamic file is
opened. For the remote system, this copy will become out of date as
the file is updated by the directly connected system. There is also
the possibility that the file header will overwritten by the out of
date version when the remotely mounted version is closed by Universe.
Uv/Net is a separately priced product but probably worth it for your
situation. You only need it on the system that is accepting the
remote access, not the one that is initiating them.
-Rick
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