PFS mirror problems

[Lanir]

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!
>>>>
>>>>