Date: Wed, 28 Sep 2016 09:31:44 +0700 From: Victor Sudakov <vas@mpeks.tomsk.su> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-questions@freebsd.org Subject: Re: complete clone/restore from a ZFS-based system replication stream Message-ID: <20160928023144.GA8980@admin.sibptus.transneft.ru> In-Reply-To: <78faa2e2-0e44-27ef-eaf0-0f0fc358cc09@sentex.net> References: <20160926154720.GA75556@admin.sibptus.transneft.ru> <688eec35-bc7b-ae05-b765-106933b522d1@sentex.net> <20160927085322.GA96393@admin.sibptus.transneft.ru> <78faa2e2-0e44-27ef-eaf0-0f0fc358cc09@sentex.net>
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Mike Tancsa wrote: > > > > 1. When you boot from this pool later on a restored system, don't the > > "-o altroot=/mnt2 -O canmount=off" options prevent it from > > working normally? I gather that "altroot" is not persistent across > > reboots, but "canmount" probably is. > > Its been a while, but when you do the zfs recv, I am guessing the > properties are restored with it ? > > > > > 2. If you wanted to check "zfs recv" without actually restoring it, > > what what you do? I keep getting the "cannot receive incremental stream" error: > > Not sure. When you did this, perhaps you are restoring from an > incremental send as opposed to a full send ? > > eg > > zfs snapshot -r zroot@backup > zfs send -R zroot@backup > /nfs-mount-on-backup-server/zroot-full-snap.zfs Below is exactly how I create and test the replication stream: root@zfs1:~ # zfs send -R zroot@test1 > /mnt/zroot1.zfs root@zfs1:~ # zpool create -f -o altroot=/mnt2 -O canmount=off -m none foobar1 vtbd2 root@zfs1:~ # zfs receive -vFn foobar1 < /mnt/zroot1.zfs would receive full stream of zroot@test1 into foobar1@test1 would receive full stream of zroot/var@test1 into foobar1/var@test1 would receive full stream of zroot/var/mail@test1 into foobar1/var/mail@test1 would receive full stream of zroot/var/crash@test1 into foobar1/var/crash@test1 would receive full stream of zroot/var/tmp@test1 into foobar1/var/tmp@test1 would receive full stream of zroot/var/audit@test1 into foobar1/var/audit@test1 would receive full stream of zroot/var/log@test1 into foobar1/var/log@test1 would receive full stream of zroot/tmp@test1 into foobar1/tmp@test1 would receive full stream of zroot/ROOT@test1 into foobar1/ROOT@test1 would receive full stream of zroot/ROOT/test1@2016-08-22-21:58:22 into foobar1/ROOT/test1@2016-08-22-21:58:22 cannot receive incremental stream: destination 'foobar1/ROOT/test1' does not exist root@zfs1:~ # I don't see anything incremental about it. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN sip:sudakov@sibptus.tomsk.ru
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