Re: [Koha-zebra] Perl Zoom Persistent Connections

[Thomas D]

Would all users using the same YAZ Proxy share the same collective
authentication, as in PHP/YAZ, perhaps based on the institution where the
YAZ Proxy server is located?

If authentication is shared, Joshua's concerns about problems from shared
authentication might be addressed as follows.

Multiple YAZ Proxy servers at the client institution could be used.  One YAZ
Proxy server authenticates for public users to regional union catalogue
targets for example.  Another YAZ Proxy server for cataloguers, interlibrary
loan, etc. authenticates additionally to some expensive fee based targets
for example.  Expensive fee based targets may have resources needed for
better copy cataloguing or interlibrary loans for material not identifiable
without consulting a fee based union catalogue.

Within Koha, one YAZ Proxy server may be used by the OPAC.  Another YAZ
Proxy server might be used by the administration module.  Still more YAZ
Proxy servers could be provided for different classes of users and
administrators.  Different classes of users are often distinguished by
whether they are connecting from a terminal physically within the library as
opposed to when the same user connects from home.


Thomas D

Quoting Sebastian Hammer <address@hidden> :
> ---------------- Beginning of the original message ------------------
> 
> At 10:15 AM 8/20/2005 +0100, Mike Taylor wrote:
> 
>  > Will the forthcoming Perl Zoom bindings support persistent
> > > connections, either shared or user specific?
> >
> >The documentation for ZOOM-C, at
> >        
> http://indexdata.com/yaz/doc/zoom.tkl#zoom.connections
> >does not include any mention of "persistent connections" in
> Table 3.1
> >of the ZOOOM Connection Options.  So, no, that is not
> behaviour that
> >ZOOM-Perl will inherit from ZOOM-C.  But as Seb's pointed
> out, you can
> >get a better version of the same functionality using YAZ
> Proxy.  The
> >existence of this option in PHP/YAZ is a just a hangover from
> its
> >pre-YAZ Proxy days.
> 
> Oh. Good points. The 'persistent' option in PHP/YAZ has more
> to do with its 
> being an Apache module than with its being a ZOOM derivative!
> 
> I dunno if a Perl API will be able to support such an option,
> perhaps when 
> the script is run under mod_perl.. but either way, it doesn't
> make much of 
> a difference. Even if the connections to the proxy are not
> persistent, the 
> proxy will still know how to maintain proper, persistent
> connections to the 
> backend server.
> 
> > > I had given reasons that I had thought that persistent
> connections
> > > were useful with even one user retrieving large result
> sets in my
> > > previous post on a different branch of this thread.
> >
> >Once more, remember that _all_ Z39.50 connections are
> "persistent" in
> >the usual sense of the word (as opposed to specialised
> PHP/YAZ sense).
> >You only open the connection once, then use it for many
> searches and
> >retrievals.
> 
> But remember that this is far from automatic in a web
> environment, Mike. 
> That is the kind of optimization that the proxy provides,
> however, and 
> automatically at that.
> 
> --Sebastian
> --
> Sebastian Hammer, Index Data, www.indexdata.com
> Direct phone: (603) 209-6853 Fax: (603) 357-1813
> 
> 
> 
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