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Thanks, Mike! The understanding and support of my peers is important to me! :-) Ralph > -----Original Message----- > From: Z39.50 Next-Generation Initiative [mailto:[log in to unmask]] On Behalf Of > Mike Taylor > Sent: Wednesday, December 15, 2004 11:44 AM > To: [log in to unmask] > Subject: Re: SRU using POST (Was: Adlib Base profile) > > > Date: Wed, 15 Dec 2004 11:22:02 -0500 > > From: "LeVan,Ralph" <[log in to unmask]> > > > > > > Currently SRW has pride of place, as it was expected that SRW would > > > > be at least as frequently implemented as SRU, which turns out not to > > > > be the case. > > > > > > No indeed. > > > > Sorry, I let this comment go by once, but need to react. > > :-) > > > My experience is that SRW is significantly more efficient than SRU. > > (I've got a paper on the subject in progress.) > > I'll be interested to see this. > > > In java, you have to make a new URL for every SRU transaction. That > > turns out to be expensive. Running it over SRW lets the URL be > > reused and was considerably more efficient. > > I think this is a red herring. So far as HTTP (1.1) is concerned, one > is at liberty to reuse the same TCP/IP connection for a sequence of > HTTP requests, so there is no fundamental performance hit involved in > issuing multiple SRU requests against a single server. You seem to be > saying that the particular Java library you're using for HTTP GET is > badly written and doesn't take advantage of this ability; but that is > a weak reason to criticise the _protocol_. People for whom SRU > performance is an issue should just get (or write) a better > implementation. > > > Switching from the SOAP toolkit to hand-built SOAP messages resulted > > in yet more efficiency. > > Ah, you ended up doing that, too, then? :-) > > > I suspect I'll be bringing up the topic of SOAP in document mode > > instead of RPC mode before too long. > > Ah ... Then we'll be cookin' with gas. If I understand rightly, that > would allow us to reintroduce asynchronous (server-originated) packets > such as Access Control from Z39.50 -- right? > > _/|_ _______________________________________________________________ > /o ) \/ Mike Taylor <[log in to unmask]> http://www.miketaylor.org.uk > )_v__/\ "These lions you saw. Did they ... eat ants?" / "Yes, > that's right." / "No, those weren't lions you saw. They were > anteaters" -- Monty Python's Flying Circus. > > -- > Listen to free demos of soundtrack music for film, TV and radio > http://www.pipedreaming.org.uk/soundtrack/