On Sun, Feb 19, 2006 at 06:08:40PM -0600, Edward Summers wrote:
> If you find out anything and have the time please post your findings
> here for the rest of us :-)
Thanks for the pointers.
On further investigation I discovered the present() method in
Net::Z3950::ResultSet.
This pre-fetches a given range of results in one shot.
So, rather than a simple loop around the resultset, I now do something
like:
for my $i (1 .. $numrec) {
$rs->present($i, 20) unless $i % 20;
my $zrec = $rs->record($i);
}
The time it takes to fetch each batch varies significantly (sometimes
over 5 seconds), but I haven't yet seen a pattern to it that would imply
throttling. At a guess I would say it's more likely to be a queueing
system at the far end.
I need to do some more analysis to work out what the most effective
quantity is to pre-fetch at a time, but this seems to work nicely for
now.
Thanks,
Tony
