Newsgroups: news.software.b
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Enhanced dbz for SunOS 4.0
Message-ID: <1989Jun28.180430.2743@utzoo.uucp>
Organization: U of Toronto Zoology
References: <17059@elroy.Jpl.Nasa.Gov>
Date: Wed, 28 Jun 89 18:04:30 GMT

In article <17059@elroy.Jpl.Nasa.Gov> david@elroy.Jpl.Nasa.Gov (David Robinson) writes:
>Below is a SunOS 4.0 specific enhancement to dbz that mmap()'s
>the history file and .pag file into main memory and accesses it
>directly instead of through lseek() and read()...

One of our early C News users has modified dbz to do roughly the same
thing portably, by just keeping everything in memory and writing it out
at the end.  I want to take a hard look at his code before promising
anything, but it may be part of the next patch.  On machines with plenty
of address space and physical memory, apparently it really makes things
fly.  (C expire, in particular, is *very* dbm-bound and should benefit a
lot from this.)

>lcase() [which was broken] was replaced by strcasecmp() from the
>4.3BSD distribution archives on UUNET.

Note that if you're trying this dbz in C News, you want to comment out the
lcase/strcasecmp entirely.  C News doesn't do the case mapping.
-- 
NASA is to spaceflight as the  |     Henry Spencer at U of Toronto Zoology
US government is to freedom.   | uunet!attcan!utzoo!henry henry@zoo.toronto.edu