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Subject: Re: KMIP versioning
- From: Bruce Rich <brich@us.ibm.com>
- To: kmip@lists.oasis-open.org
- Date: Thu, 27 Jan 2011 06:38:27 -0600
One other point to add to the discussion:
We have a bit of a chicken-and-egg issue
if we expect to use a QUERY operation to discover things about the server...since
a QUERY is itself a KMIP operation, encoded like the rest, it must have
a protocol version number in its encoding, so how does a v.next client
encode a QUERY to a server? Does it encode it at v.next and interpret
a failure on a QUERY as "try your question again at a lower protocol
level"? This seems uncomfortably close to a "Mr Eight Ball"
protocol, but instead of getting a "Try again later" response,
we have to interpret a failure as a "Try again earlier" response.
And we also have to discuss how we can
make versioning work in the other direction, on server-to-client ops. But
that discussion can probably wait on the client-to-server resolution. We
just need to remember that versioning needs to work duplex, although the
mechanism need not be identical.
Bruce A Rich
brich at-sign us dot ibm dot com
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