cups-lpd with a space limited print spool

[Sebastian James]

> Sebastian James wrote:
> > ...
> > Here is a patch to do this. It does it by keeping tabs on available
> > space and pausing the cups-lpd process when there is not enough room.
> > The code will only work reliably if you know a maximum size for your
> > print jobs, so this is not a general purpose fix for everyone, rather
> > a fix for our problem of printing many fixed or similar size print
> > jobs in a production situation.
>
> The issue with this approach is that you can't assume that a) the
> temp directory and spool directory are on the same filesystem, and
> b) that another process won't use that space up before you queue to
> cupsd.

Yes, that's true, but in our case we know there's nothing else filling that space up. Take the point about the temp directory and spool directory.

> > Next, we're going to look into adding a compile time option to remove
> > the necessity for temporary files from the data flow in cups, placing
> > everything in memory and streaming jobs through the filter(s). Wish
> > us luck!
>
> Hopefully you have small jobs - we wouldn't be able to use that in
> the official CUPS, where we sometimes see multi-gigabyte jobs...

No, we have really small jobs.

> > Here's the patch (with apologies for the fact that it has messed up
> > indentation of comments):
>
> Yeah, that makes it pretty much impossible to review the patch...

Sorry - I'll do it properly tomorrow. We're having unseasonally hot weather here at the moment, which is fugging my brain.

Seb James