30 ноября 2016 г. 17:45:53 CET, "Дмитрий Глушенок" <gl...@jet.msk.su> пишет: >The 'reboot' works, but it kills all processes at once (including >iscsid), leaving no chances for ZFS to flush write cache. And I suspect >that with current iscsi/initiator SMF service implementation the same >happens (but for some reason sync(), which is being called by 'reboot' >after killing all processes, is not hangs). > >> 30 нояб. 2016 г., в 18:05, Chris Siebenmann <c...@cs.toronto.edu> >написал(а): >> >>> Does anybody uses ZFS over iSCSI? >>> >>> There is problem with reboots as iscsi-initiator service does not >>> taking care of ZFS while shutting down. It leads to zpool goes into >>> UNAVAIL state and then first sync() issued gets blocked with >following >>> stack: >> >> We have a significant ZFS-over-iSCSI fileserver environment and >> haven't seen this, but we may be shutting our systems down in a >> different way than you are. >> >> We're on OmniOS r151014 and we haven't seen this behavior when we >> reboot or shut down our systems via 'reboot' or 'poweroff'. For us it >> seems to go the other way around; running 'reboot' won't completely >shut >> down the iSCSI initiator before the machine reboots, apparently >because >> it's being held busy by our active ZFS pools. >> >> It may be relevant that we're using OmniOS multipathing across two >> IPs for each target (configured statically); this might change the >> device stack inside the kernel. >> >> I don't think we've ever tried 'shutdown' itself on a live production >> system, so I don't know how that would work. >> >> - cks > >-- >Dmitry Glushenok >Jet Infosystems > > > >------------------------------------------------------------------------ > >_______________________________________________ >OmniOS-discuss mailing list >OmniOS-discuss@lists.omniti.com >http://lists.omniti.com/mailman/listinfo/omnios-discuss
Shameless plug: did you try an approach like https://github.com/jimklimov/illumos-smf-zfspools to define an SMF dependency between a pool whose vdevs reside on an iscsi initiator, or an iscsi target residing on a pool, and perhaps other services like zones to depend on the non-rpool zfs pool (SMFized)? At least for the case of well ordered and synced graceful shutdowns and startups, this should help you. HTH, Jim Klimov -- Typos courtesy of K-9 Mail on my Samsung Android _______________________________________________ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
