----- Am 19. Feb 2016 um 21:31 schrieb Zdenek Kabelac zdenek.kabelac@gmail.com: > Dne 19.2.2016 v 19:40 Lentes, Bernd napsal(a): >> Hi, >> >> i have a script in which i invoke lvremove and lvcreate. With lvremove i don't >> have proplems but with lvcreate. >> I'm redirecting stdout and stderr to a file because the script is executed by >> cron and i'd like to have a look afterwards if everything went fine. >> The command is: lvcreate -v -L 25G -n lv_root_snapshot -s vg1/lv_root > >> lvcreate_with_redirection.log 2>&1. Shell does not accept further commands >> afterwards, but host still responds to ping. You can have a look on >> lvcreate_with_redirection.log here: >> https://hmgubox.helmholtz-muenchen.de:8001/d/b4c7025bac/ . >> System seems to stop while suspending. >> >> last lines of the log: >> ====================================================== >> >> ... >> Creating vg1-lv_root_snapshot-cow >> Loading vg1-lv_root_snapshot-cow table (252:3) >> Resuming vg1-lv_root_snapshot-cow (252:3) >> Loading vg1-lv_root_snapshot table (252:1) >> Suspending vg1-lv_root (252:0) with filesystem sync with device flush >> ====================================================== >> > > > Unfortunately you can't do that if you log to the SAME volume you are > suspending - i.e. you run your command from your root volume > which is also suspended. > > We could likely 'buffer' the output while in suspend mode, > and throw out the output later - but as this is seen as 'debug' help it's > assume user takes care and user place for logging which doesn't block. > > So if you want to see logs - use something tmpfs location for it. > > Regards > > > Zdenek > Hi Zdenek, thanks for your answer. I redirected the output already to another partition, but system still stopped. Maybe because the partition is on the same disk as the lv ? Whole disk is suspended ? It's not possible to suspend just a partition ? I will try with tmpfs or something else. But does that mean that redirection is generally not possible when suspending a lv ? Or just in my case because i invoke lvcreate ? What is about other programs having redirections during the suspend ? And why does it work when i just rediredt stdout ? When i redirect stdout and stderr system stops. Bernd Helmholtz Zentrum München Helmholtz Zentrum Muenchen Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) Ingolstaedter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDir'in Baerbel Brumme-Bothe Geschaeftsfuehrer: Prof. Dr. Guenther Wess, Dr. Alfons Enhsen, Renate Schlusen (komm.) Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671 _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
