RE: Authoriy Work Implications?

["Gould, Christopher A." <GouldC at umsystem dot edu>]

Hi Stephen.

I do not know whether or not you have AACP (Automatic Authority Control
Processing) turned on for your system. If you do, I highly recommend you
experiment with the number of (authority) records you can safely load,
given that any given authority record has the potential to update
hundreds (or even thousands) of bib headings.

HTH

cag

Christopher Gould
Software Support Analyst - Specialist 
MOBIUS: Linking Missouri's Academic Libraries
3215 B Lemone Blvd.
Columbia MO 65211
573-882-7235
GouldC at umsystem dot edu

> -----Original Message-----
> From: innopac-bounces at innopacusers dot org 
> [mailto:innopac-bounces at innopacusers dot org] On Behalf Of 
> Stephen McLaughlin
> Sent: Wednesday, November 17, 2004 11:49 AM
> To: IUG INNOPAC List
> Subject: Authoriy Work Implications?
> 
> I'm about to do a massive replacement of authority records, 
> and I want to make sure I understand all the potential 
> side-effects. Here's what's on tap:
> 
> In our previous (DRA) system, there was one authority file, 
> so only one name authority record was needed, since it served 
> as both a name and a subject-name authority. When we migrated 
> to Innovative, we were unable to distinguish pure name 
> authorities from name + subject authorities, so we dumped ALL 
> the name authorities in with the subject authorities.
> 
> This, of course, hugely bloated our subject authority file, 
> so we sent our entire bibliographic database off to OCLC for 
> MARS authority processing. They updated the bib records 
> (which have been loaded already into the database, overlaying 
> the original versions) and sent us files with the appropriate 
> name and subject authority records. Now I need to swap out 
> the new authorities for the old ones.
> 
> I have devised a somewhat complex process that is intended to 
> preserve certain local headings, as well as authorities 
> loaded since the bib extract (now several months ago - there 
> was a lot of clean-up after the loading of the bib records, 
> but we won't go into that right now!).
> Because I don't want to fill up the bibtemp file, I will be 
> loading the authority records in smallish batches (probably 
> about 50,000 per day is the maximum, based on past 
> experience). What worries me is this: Will there be any sort 
> of an impact on the overnight headings reports (and 
> consequently on system performance) from dumping 50,000 
> authority records a day over several days into the database? 
> I'm afraid I do not have a good grasp of how the headings 
> reports work, when flipping of headings in bib records is 
> invoked by a new authority record, and so forth, to 
> understand the possible side-effects of loading so many 
> authority records into the database.
> 
> I would be very grateful for any advice, warnings, 
> suggestions, horror stories or tales with happy endings that 
> may help guide me as I work my way through what promises to 
> be a highly, um, entertaining experience!
> 
> Many thanks!
> 
> Steve McLaughlin
> San Francisco Public Library
> smclaughlin at sfpl dot org
> 
> 
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