PFS mirror problems

[Tomohiro Kusumi]

I'll see if I can reproduce it within a few days and try to fix it if
that's a bug,
since I'm currently trying to fix lots of PFS related bugs.

2016-08-25 5:31 GMT+09:00 Lanir <lanir at cisns.net>:
> I'm on 4.6-RELEASE.
>
> When I unmounted and remounted the base hammer filesystem it showed a
> matching size. But when I stop the mirror-stream and mount the
> former-slave PFS, I have no data to show for it. After a reboot the size
> is off again.
>
> I'm a little confused about what's actually going on with it at the
> moment. Data appears to be there but inaccessible. I think that bug is
> related to what I'm seeing.
>
>
>
>
> On 08/24/16 09:37, Tomohiro Kusumi wrote:
>>> This might be related to the bug I reported:
>>>
>>> http://bugs.dragonflybsd.org/issues/2915
>>
>> Lanir,
>> Based on Tim's report on DragonFly 4.5, what's your uname -r ?
>>
>>
>>
>> 2016-08-24 22:23 GMT+09:00 Tomohiro Kusumi <kusumi.tomohiro at gmail.com>:
>>> BTW what I mean by unmounting is unmounting hammer, but not PFS (if
>>> you've null mounted them somewhere or your dfly installer has done
>>> it).
>>>
>>> 2016-08-24 22:14 GMT+09:00 Tomohiro Kusumi <kusumi.tomohiro at gmail.com>:
>>>> I first saw this in 2014 when I first used DragonFly (I think 3.8).
>>>> It happened without upgrade or downgrade of PFS.
>>>>
>>>> Unmounting once and then mounting again made the slave PFS in sync with master.
>>>> It may not be possible in your case as yours seem to be / fs.
>>>>
>>>>
>>>>
>>>> 2016-08-24 12:53 GMT+09:00 Lanir <lanir at cisns.net>:
>>>>> Hi,
>>>>>
>>>>> I think I must have setup the mirroring incorrectly because nothing is
>>>>> happening. I tried following the guide "how to implement hammer pseudo
>>>>> file system( pfs ) slave mirroring from pfs master" on the website but
>>>>> something appears to have gone wrong.
>>>>>
>>>>> I have two 7.3tb hammer filesystems spread over two physical disks each
>>>>> on the same system. I had problems creating the slave PFS so created it
>>>>> as a master, demoted it, then altered the shared-uuid to match before
>>>>> trying to mirror it. When I do a mirror-copy I get this result:
>>>>>
>>>>> # hammer mirror-copy /usr/stor/backups /usr/backup-stor/pfs/backups
>>>>> Mirror-read /usr/stor/backups succeeded
>>>>> #
>>>>>
>>>>> The data is obviously not being copied over:
>>>>>
>>>>> # df -h /usr/stor /usr/backup-stor
>>>>> Filesystem                       Size   Used  Avail Capacity  Mounted on
>>>>> stor1                            7.3T    44G   7.2T     1%    /usr/stor
>>>>> backup-stor1                     7.3T   1.0G   7.3T     0%
>>>>> /usr/backup-stor
>>>>>
>>>>> As far as I can tell they're setup correctly:
>>>>>
>>>>> # hammer pfs-status /usr/stor/backups /usr/backup-stor/backups/ | egrep
>>>>> '(shared-uuid|operating)'
>>>>>     shared-uuid=4138d697-3355-11e5-99b1-e13f494aab78
>>>>>     operating as a MASTER
>>>>>     shared-uuid=4138d697-3355-11e5-99b1-e13f494aab78
>>>>>     operating as a SLAVE
>>>>>
>>>>>
>>>>> Can someone help point me towards the problem? I feel like I may have
>>>>> missed something.
>>>>>
>>>>>
>>>>> Thank you!
>>>>>
>>>>>
>
>