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Date:      Fri, 24 Nov 2023 09:17:41 +0100
From:      Alexander Leidinger <Alexander@Leidinger.net>
To:        Oleksandr Kryvulia <shuriku@shurik.kiev.ua>
Cc:        freebsd-current@freebsd.org
Subject:   Re: openzfs and block cloning question
Message-ID:  <25dab6bbc32f85ac710535776cd9d376@Leidinger.net>
In-Reply-To: <17265de6-fcbb-4154-adbd-4c56552b747d@shurik.kiev.ua>
References:  <17265de6-fcbb-4154-adbd-4c56552b747d@shurik.kiev.ua>

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[-- Attachment #1 --]
Am 2023-11-24 08:10, schrieb Oleksandr Kryvulia:
> Hi,
> Recently cperciva@ published in his twitter [1] that enabling block 
> cloning feature tends to data lost on 14.  Is this statement true for 
> the current? Since I am using current for daily work and block cloning 
> enabled by default how can I verify that my data is not affected?
> Thank you.

Block cloning may have an issue, or it does things which amplifies an 
old existing issue, or there are two issues...
The full story is at
     https://github.com/openzfs/zfs/issues/15526

To be on the safe side, you may want to have 
vfs.zfs.dmu_offset_next_sync=0 (loader.conf / sysctl.conf) for the 
moment.

Bye,
Alexander.

-- 
http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF
http://www.FreeBSD.org    netchild@FreeBSD.org  : PGP 0x8F31830F9F2772BF

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