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Date:      Mon, 13 Nov 2017 07:33:22 +1300
From:      Jonathan Chen <jonc@chen.org.nz>
To:        Grzegorz Junka <list1@gjunka.com>
Cc:        freebsd-ports@freebsd.org
Subject:   Re: Firefox (Doesn't) Build
Message-ID:  <CAJuc1zNqseCoKEq=%2BgRcO%2BRgvp3jVAq5LXu-2=-woTtOgJiM0Q@mail.gmail.com>
In-Reply-To: <a3c414cc-2cf6-2dec-c467-c2ed0aa5c1e6@gjunka.com>
References:  <BL2PR05MB2274B42AD1B2CFE4B5215767BB550@BL2PR05MB2274.namprd05.prod.outlook.com> <BL2PR05MB22748A248A96B4ECBE5E40EBBB550@BL2PR05MB2274.namprd05.prod.outlook.com> <CAJuc1zM1JqzYYUOHTP=VpAqi6Rz%2BEvGAW6OyODsg9W_mjH6xMg@mail.gmail.com> <a3c414cc-2cf6-2dec-c467-c2ed0aa5c1e6@gjunka.com>

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On 13 November 2017 at 00:03, Grzegorz Junka <list1@gjunka.com> wrote:
> On 12/11/2017 07:14, Jonathan Chen wrote:
>>
>> On 12 November 2017 at 12:16, Patrick Dorion <dorionpatrick@outlook.com>
>> wrote:
>>>
>>> What's the difference between using Poudriere or Synth, though?
>>>
>>> This is a clean system, I can't imagine a jail being cleaner... it was
>>> unpacked from the DVD the day before yesterday....
>>
>> Both are clean room builds; ie where only minimal build dependancies
>> are installed for each port build. The main difference is that:
>>   * poudriere uses jails to achieve this
>>   * synth uses unionfs+chroot to achieve this
>
>
> Does it mean synth can't be used on ZFS? AFAIK unionfs isn't properly
> supported on ZFS, i.e. a file that exists in the underlying fs can't be
> marked as deleted in the overlying fs.

synth uses unionfs for read-only access to the build-host's files; eg:
ports-dir, system binaries. In normal operation, all build artifacts
are generated onto on an isolated tmpfs filesystem. There are no
additions/removals on the build-host's filesystem.

Cheers.
-- 
Jonathan Chen <jonc@chen.org.nz>



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