Hi all, A few questions about running multiple build jobs in parallel:
According to the manual the number of build users (eg guixbuilder01) determines how many jobs can be run in parallel. If we have 10 guix builder accounts and do not specify --max-jobs explicitly, does this mean that 10 builds can be done in parallel - i.e 10 invocations of "guix build" will run in parallel, for example? If I set the daemon to --max-jobs=4, will that restrict it to 4 builds in parallel, even if more guix builder accounts exist? If yes, then are further builds queued until an available account becomes available, or do they fail? Are these conditions changed by the introduction of a machines.scm? i.e. if we have a build farm containing 4 machines, each with 10 guix builder accounts, will parallel building still be restricted to the 10 guix builder accounts on the parent machine (the machine with the machines.scm)? I see that settting --max-jobs to 0 and having machines to offload to results in no builds taking place on the parent. I understand if no machines are contactable the build will fail? However, what happens if all machines in the machines.scm are already busy (no slots available)? Does any further build request fail, or is it queued? If --max-jobs is set to 0 on the parent, are builds still restricted by the number of build users on the parent box? Thanks! Phil.
