Re: [discuss] Cannot receive older ZFS dumps

["Udo Grabowski (IMK)" <udo.grabowski@kit.edu>]

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On 02/08/2024 19:21, Toomas Soome via illumos-discuss wrote:
>
>
>> On 2. Aug 2024, at 20:09, John D Groenveld via illumos-discuss <discuss@lists.illumos.org> wrote:
>>
>> In message <1c2abfa3-df73-91cb-79da-c34eaeca3af7@kit.edu>, "Udo Grabowski (IMK)" writes:
>>> Did some more testing, could also import it on an 8 years old pool
>>> (illumos-a90d75b) with all the features (known at that time) active or enab=
>>> led:
>>
>> I'm not able to reproduce.
>> Here's my test procedure:
>> Booted 151a8
>> Created two pools:
>> # mkfile 64M /root/features
>> # mkfile 64M /root/version28
>> # zpool create features /root/features
>> # zpool create -d -o version=28 version28 /root/version28
>> # zfs create features/test
>> # zfs create version28/test
>> # dd if=/dev/urandom of=/features/test/wee bs=1024k count=16
>> # md5sum /features/test/wee
>> # cp /features/test/wee /version28/test/
>> # md5sum /version28/test/wee
>> # zfs snapshot features/test@foo
>> # zfs snapshot version28/test@bar
>> # zfs send features/test@foo>features.snapshot
>> # zfs send version28/test@bar>version28.snapshot
>>
>> copy the snapshots to today's OI, illumos-533d257436
>>
>> # zfs receive -v rpool/features< features.snapshot
>> # zfs receive -v rpool/version28< version28.snapshot
>> # md5sum rpool/features/test/wee
>> # md5sum rpool/version28/test/wee
>>
>> John
>> groenveld@acm.org
>
> I’m afraid it is related to specific feature; we would need to get list of enabled and active features from receiving side (as sending side does not have features).
>
> And then there is a question what is specific about that file which is triggering the receive error…  is it possible to get hands on send stream maybe?
>
> (I’m investigating one send+receive case which is triggering receiving pool to get to suspended state and it is quite a challenge).

Here is the ZFS dump (1.8GB) <https://imk-asf-mipas.imk.kit.edu/users/grabow/> :

32@20100825
32@20100825_xxhsum
features_importable
features_nonimportable

+ xxhsum checksum , + features active/enabled on 2018/4 pool where
it can be imported, and features on a very recent pool where it can't.
The zfs filesystem contained is Results/imk/32.
-- 
Dr.Udo Grabowski  Inst.of Meteorology & Climate Research IMK-ASF-SAT
https://www.imk-asf.kit.edu/english/sat.php
KIT - Karlsruhe Institute of Technology          https://www.kit.edu
Postfach 3640,76021 Karlsruhe,Germany T:(+49)721 608-26026 F:-926026


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