Re: BRT copying feature

Hi,

Another option is this.

The installer /usr/sbin/bsdinstall uses a script called /usr/libexec/bsdinstall/zfsboot. Zfsboot defines this:

#
# Default options to use when creating zroot pool
#
: ${ZFSBOOT_POOL_CREATE_OPTIONS:=-O compress=lz4 -O atime=off}

You can set this environment variabele to your liking before starting bsdinstall.

ZFSBOOT_POOL_CREATE_OPTIONS="-O compress=lz4 -O atime=off -o feature@block_cloning=disabled" bsdinstall

If you are booting from an USB stick installer you can also change the zfsboot script on the USB stick and restart the installer.

NB: don't confuse the option with ZFSBOOT_BOOT_POOL_CREATE_OPTIONS.

Regards,
Ronald.

 
Van: Ronald Klop <ronald-lists@klop.ws>
Datum: donderdag, 7 november 2024 12:56
Aan: Johan Hendriks <joh.hendriks@gmail.com>
CC: FreeBSD Current <freebsd-current@freebsd.org>
Onderwerp: Re: BRT copying feature
> 
>  
> Van: Johan Hendriks <joh.hendriks@gmail.com>
> Datum: donderdag, 7 november 2024 11:43
> Aan: Ronald Klop <ronald-lists@klop.ws>
> CC: FreeBSD Current <freebsd-current@freebsd.org>
> Onderwerp: Re: BRT copying feature
>> 
>>  
>> 
>> On 06/11/2024 13:15, Ronald Klop wrote:
>>> Hi,
>>> 
>>> When you create a new pool you can use something like this:
>>> zpool create -o feature@block_cloning=disabled ...
>>> 
>>> I tried setting this on an existing pool. That gave me an error.
>>> # zpool set feature@block_cloning=disabled zdata4
>>> cannot set property for 'zdata4': property 'feature@block_cloning' can only be set to 'disabled' at creation time
>>> 
>>> So to install a new 14.2 system you need to do some manual work to create the root pool with the options you prefer.
>>> 
>>> Regards,
>>> Ronald.
>>> 
>>>  
>>> Van: Johan Hendriks <joh.hendriks@gmail.com>
>>> Datum: woensdag, 6 november 2024 09:37
>>> Aan: FreeBSD Current <freebsd-current@freebsd.org>
>>> Onderwerp: BRT copying feature
>>>> 
>>>> I installed the latest 14.2 Beta and i noticed that on the root pool the BRT copying feature is enabled on the pool.
>>>> I know i need to set vfs.zfs.bclone_enabled=1 to really make us of it. But i do not want this on my root pool but i do want to use it on my storage pool.
>>>> I can not disable this feature on the root pool as it is a feature that can only be set at creation time.
>>>> 
>>>> Is there a way to use this feature only on selected pools?
>>>> 
>>>> regards,
>>>> Johan Hendriks
>>>> 
>>>>  
>>>> 
>>>> 
>>>> 
>> I think that it would be nice if the installer has the option to set a feature like this to off. Is it easy to break out of the installer, create the pool before hand and use that pool?
>> 
>> Regards,
>> Johan.
> 
> 
> Hi Johan,
> 
> The installer gives me the option to partition manually (which does not give me the option you are looking for) or open a shell which gives you all the power you need.
>  
> Partitioning
>  How would you like to partition your disk?      
>   
>  Auto (ZFS) Guided Root-on-ZFS                 
>  Auto (UFS) Guided UFS Disk Setup              
>  Manual     Manual Disk Setup (experts)        
>  Shell      Open a shell and partition by hand 
>   
> 
>               [  OK  ]     [Cancel]              
> 
> 
> I can't say if you will find it easy or not.
> Good luck!
> 
> Regards,
> Ronald.
>