Oops -- hit send instead of save :/ to complete my thought : On Tue, Sep 30, 2008 at 1:36 PM, Ryan Higgins <ryan.higgins@liblime.com>wrote:
Yes, this will be a significant change, but one I think is necessary. It will only be more difficult to test later when more features are added.
Serial records become unmanageable when they
... reach a couple hundred items. We had a couple of bugs caused by the duplication of the data in early 3.0 that were subsequently fixed, but caused the data in marc vs items table to become out of sync. I think this move will improve performance quite a bit, as it not only affects many-item records, but our availability and circ status. Some quick profiling reveals that xml parsing is by far the greatest component of most operations in Koha. Removing the need to parse the full bib record on every circ transaction should be a good step in improving performance imo. Ryan On Tue, Sep 30, 2008 at 8:26 AM, Paul POULAIN <paul.poulain@free.fr> wrote:
Galen Charlton a écrit :
Consequently, I propose the following changes, in order of priority:
1. Take item data out of biblioitems.marc*. Instead, whenever item records need to be embedded in a MARC bib record (primarily during Zebra indexing or record export), do it on the fly. If a bib record has lots of items, this will still be an expensive operation, but it will take place in a batch job or indexing daemon. 2. Separate the item field mapping from the rest of the MARC framework. Allow multiple item field mappings, each identified by a code, and add the ability to specify a mapping to be used during record import, export, or indexing. 3. Switch to Zebra's DOM filter and supply item data for indexing outside of the MARC bib record; instead, define an XML schema to wrap bib, item, and summary records without force the last two to be embedded in the MARC. This is similar to an idea that I believe Tümer Garip proposed back in 2006.
this is a good idea. BUT : it means making heavy changes in Koha, as it's the core of most features we have. Even if we have nice packages & a stable API, I think the changes will be heavy. I spoke of that with hdl this morning, he fully agree.
So I think this change must be carefully estimated, and double checked if we can include that in 3.2 with the timeline you've announced (and that I fully agree with)
-- Paul POULAIN http://www.biblibre.com Expert en Logiciels Libres pour l'info-doc NOUVEAU TELEPHONE : 04 91 81 35 08 _______________________________________________ Koha-devel mailing list Koha-devel@lists.koha.org http://lists.koha.org/mailman/listinfo/koha-devel
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Ryan Higgins
LibLime * Open-Source Solutions for Libraries Featuring KohaZOOM ILS 888-564-2457 x704
-- Ryan Higgins LibLime * Open-Source Solutions for Libraries Featuring KohaZOOM ILS 888-564-2457 x704