I have an application where I will be doing updates to several RRD databases
on about a 5-10 second interval. In this application, I think it would be
desirable to be able to hold open the filehandles on the databases and
perform updates without the overhead of re-opening and re-closing the
files, etc. Is there any code already existing that would allow
something along the lines of:
FH=RRDs::open("foo.rrd");
$c=1;
while($c)
{
sleep(10);
($c, $when, $foo, $bar, $blat, $flop)=acquirefunction();
$i=RRDs::updatefh(FH, "--template=foo:bar:blat:flop",
join(":", $when, $foo, $bar, $blat, $flop));
}
RRDs::close(FH);
exit(0);
Or is this impractical/impossible given the nature of RRD?
Obviously, this code snipet is an oversimplified example of what I am
planning to do, but it seems to me that the overhead of opening and closing
the database everytime and rereading all the state information necessary
might be a desireable thing to eliminate if possible.
Flames, etc welcome, please send to me, if it's interesting to enough people,
I'll summarize to the list.
Owen
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