[OPEN-ILS-GENERAL] Circ and Placing Holds
mrylander at gmail.com
Thu Feb 28 08:44:44 EST 2008
On Wed, Feb 27, 2008 at 10:00 PM, Bill Erickson <erickson at esilibrary.com> wrote:
> Dan Scott wrote:
> > On 27/02/2008, Bill Erickson <erickson at esilibrary.com> wrote:
> >> Grant Johnson wrote:
> >> > Hey all,
> >> >
> >> > I'm still in a test mode and have discovered that placing Holds just
> >> > freezes as a patron on the OPAC.
> >> > Checking out a book throws a network error in the Staff Client.
> >> >
> >> > Are these known issues?
> >> >
> >> > Do I need to get the Circ rules setup before these functions will work?
> >> Hi Grant,
> >> These functions should both work out of the box, provided you have
> >> calculated the Org Unit proximities, as described in
> >> http://open-ils.org/dokuwiki/doku.php?id=server_installation
> >> ("Configuring the System")
> > Hmm - I see the FIXME beside that OpenSRF call in the wiki. Would it
> > make sense to add that to autogen.sh (as we need to run autogen.sh
> > everytime the set of org units changes)?
> Indeed, I asked the same question. The problem, as I understand it, is
> the proximity calculation is very CPU intensive for large sets of org
> units. Perhaps we make autogen.sh build the proximities by default, but
> provide a flag to autogen.sh to avoid building the proximities when
It's not the CPU intensiveness that would concern me, but time in a
critical path script. The method is a blocking call (a DELETE and
then a single INSERT ... SELECT) which calculates the vector proximity
of each possible pairs of nodes in the org tree. For a large org tree
this can take a good, long while -- it uses the existing (tested,
robust) real-time tree walker SPs, and is intended to be used in an
after-hours, low-load maintenance situation in a production
environment (which is where my priorities will always go first) -- so
I'd be against having the default calculate proximities.
So, having explained the situation a bit, I could get behind a
(non-default) switch to autogen.sh which would request proximity
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