More Hammer fixups

Tomohiro Kusumi has been creating a near-constant stream of bugfixes and cleanups to Hammer for quite some time. I don’t often link to it, because they are incremental improvements and hard to linkblog, so to speak. In an effort to make up for this deficit, I do want to draw attention to his two recent commits: “Make hammer commands print root volume path“, and “Print volume list after volume-add|del“.  Small changes, but this is what makes complex systems usable.

Many, many network connections

I keep posting about Sepherosa Ziehau’s work on sustaining extremely high traffic loads in DragonFly.  Now I’m posting about a tool to create that load: kq_sendrecv.  It creates tens of thousands of TCP connections, without creating a process for each, and uses kqueue, as you might guess from the name.  This may be useful if you really want to tax another system.