Webresolve is used in conjunction with a log analyzer to get host names
rather than IP addresses in the statistics. Preprocess the log
files with webresolve to replace IP addresses with host names.
The load from webresolve is very light, because it spends most of
its time waiting for the resolver. This also means that large files
can take quite some time to process. The solution is to split the
log file and run several resolution processes in parallel. This is
done by the script splitwr.
By default, splitwr runs 20 parallel resolution processes. The number
can be changed by editing the script.