File changes propagating in older snapshots: what am I doing wrong?

[Matthew Dillon]

0x0000000000000000 is not a valid transaction id.  Not sure how it wound up
in the snapshot list but that slave has not been synchronized from a master
yet and until it is there is no real snapshot.

-Matt

On Sat, Apr 8, 2017 at 9:55 AM, <tech_lists at mail.com> wrote:

> Hi,
>
> I have other information.. the behavior started to be 100% reproducible on
> my machine: every time I added a file I found it in the past snapshot. But
> it appeared after a delay, ranging from 1 to about 20 seconds!
>
> % hammer snapls /home/attic/
> Snapshots on /home/attic/       PFS#2
> Transaction ID          Timestamp               Note
> 0x0000000000000000      2017-04-06 09:57:34 CEST        -
>
> % pwd
> /home/attic
>
> % touch a_new_file
> % ls .@@0x0000000000000000
> disk_stats.txt
>
> The file isn't in the snapshot yet. But if a i keep repeating the ls
> command after a few seconds I find it:
>
> % ls .@@0x0000000000000000
> a_new_file      disk_stats.txt
>
>
> Then I decided to run hammer cleanup:
>
> # hammer cleanup
> [... Output snipped ...]
> cleanup /home/attic          - handle PFS#2 using /var/hammer/home/attic
>            snapshots - run
>                prune - run
>            rebalance - run..
>              reblock - run....
>               recopy - skip
> [... Output snipped ...]
>
> Now I have a new snapshot but the old snapshot is gone:
>
> % hammer snapls /home/attic/
> Snapshots on /home/attic/       PFS#2
> Transaction ID          Timestamp               Note
> 0x00000001186c2200      2017-04-08 18:25:50 CEST        -
>
> This new snapshot doesn't exhibit the behavior described above: I can add
> and delete files in the main directory and the snapshot doesn't change.
>
> Sadly, now I have no access to the old snapshot to further diagnose the
> problem. I didn't think hammer cleanup would delete a snapshot from two
> days ago.
>
>
> Kind regards,
> Andrea
>
>
>
>
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