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Date:      Fri, 23 Sep 2022 15:12:05 -0700
From:      David Christensen <dpchrist@holgerdanske.com>
To:        questions@freebsd.org
Subject:   Re: zfs replication tool
Message-ID:  <2064833f-e289-3d6d-3996-4ab77fa254ed@holgerdanske.com>
In-Reply-To: <CABObuOpi2dQFFz3te-V6PX4xhzJmFzrZhr0U__q04%2BOwGFqPmg@mail.gmail.com>
References:  <0a0ba81b-88f2-fa75-9abe-6f41da5d2c69@sentex.net> <20220916140236.jeizzganrtnsrhlo@x1> <20220920092905.3k7qzt7lvhywhcfn@x1> <20220920122029.ufsoyo47qnxtmcqk@x1> <20220920132503.8bfd124b9697d90e474086b3@sohara.org> <20220920125154.n7lcqr3xzhsrylzr@x1> <20220920142314.df043149e82d63cbd289a92e@sohara.org> <4cf58433-a13b-9b35-fc3e-8fad6b2ac93d@sentex.net> <20220920141006.n6x6mxpafy3zqpk3@x1> <b7586c2c-f435-334c-dff8-f7388163fa75@sentex.net> <20220923080305.alrgrrnxljtweo3i@x1> <498d478e-7fe7-1840-6263-930b498c5bbf@holgerdanske.com> <CABObuOpi2dQFFz3te-V6PX4xhzJmFzrZhr0U__q04%2BOwGFqPmg@mail.gmail.com>

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On 9/23/22 02:51, parv/FreeBSD wrote:
> On Thu, Sep 22, 2022 at 10:58 PM David Christensen  wrote:
> ...
> 
>> I wrote homebrew scripts to automate ZFS replication and I saw that
>> error message many times in the past.  The solution was to add the '-F'
>> option to the 'zfs receive' commands.  Is there a way to do this with
>> zrepl?
>>
> 
> That "-F" option, for "zfs-recv(8)", will remove existing file system
> (on the receiver side). For the option to work, existing snapshots would
> need to be destroyed first.
> 
> That is useful if one wants to re-set up backup file system & snapshots.
> Else, what is even the point of incremental snapshot back ups.


Agreed.  And, this can be a time-consuming operation if the dataset(s) 
are large.


When 'zfs receive -F' cannot resolve the situation, the only solution I 
could think of was to destroy the destination dataset(s) and start over 
with a full replication (e.g. '-R').


David




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