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.
> 
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