[Yazlist] Performance tweaks for async. search?

Mike Taylor mike at indexdata.com
Thu Nov 29 14:05:24 CET 2007

Johannes Leveling writes:
 > Hello,
 > I am looking for even better performance of a Z39.50 database search
 > (coupling Zebra and YAZ/ZOOM).
 > My application searches multiple target systems via ZOOM,
 > retrieves the top-N ranked documents asynchronously, 
 > converts the results, and writes them to a file.
 > Is there a way to process result records as soon as they come
 > in (instead of waiting until the slowest target system has returned the
 > requested number of results)? 
 > I would like to convert partial results as soon as they are
 > available (preferably with some event-driven approach,
 > e.g. triggered by ZOOM_EVENT_RECV_DATA).

Hi, Johannes.  This is pretty much exactly what IRSpy does.  You can
download the software from
The code you'll want to consult is in check() subroutine of

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/o ) \/  Mike Taylor    <mike at indexdata.com>    http://www.miketaylor.org.uk
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