+1 to looking into implementing on Jenkins. I would suggest even considering moving the entire /var/lib dir to tmpfs instead of on disk so the other DBs will get a boost - assuming the /var/lib dir is created anyways only for the worker's lifetime and destroyed afterwards. If this even gives us a 10% boost to test speed that would be a significant step to reducing the Jenkins load.
On Thu, Aug 18, 2016 at 10:41 AM, Lukas Zapletal <l...@redhat.com> wrote: > Hello, > > this morning I observed that putting foreman git repo onto tmpfs folder > (e.g. /tmp/foreman) greatly reduces testing time by more than 50 % ! > > Running it from my checkout folder (Samsung SSD - 2014 edition): > > real 27m24.425s > user 12m25.875s > sys 0m27.050s > > And now from tmpfs: > > real 12m21.645s > user 9m59.112s > sys 0m9.877s > > I don't know if it's just the db/ directory or we do some temp files > during tests, but before I investigate this further, I'd like someone to > try this out and compare the numbers. I could made a mistake. > > If I had to guess, I think sqlite does some filesystem sync operations > which are just noops on tmpfs (it's memory or swap right). > > This would be great benefit on our Jenkins assuming there is tmpfs > available. I guess so (RHEL6+ has it). We do start always from scratch > there, so mounting/symlinking db/ should be relatively easy to do. And I > currently have about 35 MB in db/ folder, nothing that should kill the > runner. > > -- > Later, > Lukas #lzap Zapletal > > -- > You received this message because you are subscribed to the Google Groups > "foreman-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to foreman-dev+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- Have a nice day, Tomer Brisker Red Hat Engineering -- You received this message because you are subscribed to the Google Groups "foreman-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to foreman-dev+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
