RE: Advice Required - for avoiding conflict betwen qmail-smtpd, rblsmtpd loaded as shared objects in tcpserver

>On most linux systems it might, but these days things are different.
>You can run qmail under Linux or UNIX, but you might use a system, which
does not have much memory to run your qmail.
>If that's the case, the file cache might not be very efficient (or it might
be disabled).
>
>If you're developing on a system which has all the great features,
performance testing might not show the right results in cases where
"low-end" systems are used.

In any software engineering endeavor, one has to make assumptions about the
target platform.  Another way to paraphrase the
discussion between Charles and Jens is that qmail likely doesn't have a
statement about what platforms it is intended to support.

I have not worked on *nix server grade system EVER that did not cache disk.
I remember one of the first Linux systems I set up ... I
did a large file copy and noticed that the hard disk activity light did not
show activity.  Then the activity occurred about a minute later.
I laughed to myself because I realized what had occurred.  This was more
than a decade ago with a system that probably had around
512 MB of RAM.

I think Charles' assumptions are very reasonable.

I use a $250 Lenovo 11e (elementary school laptop) as a Linux server,
because it only consumes about 5.5 watts as measured at the
AC plug.  Even on THAT machine (8G of RAM, 1 TB SSD), I expect disk caching
behavior to occur.

Charles' assumptions seem valid to me from any "mainstream" piece of
hardware.

Jens, the hardware and software scenarios you are considering ... wow ... it
is almost like you hacked/rooted your smart coffee maker and
are using it as a qmail server.