Hi Chris,
Thank you very much for your suggestion.
I didn't remember which steps that I made a mistake and made the mysql had Received
UUID.
I have done the following and it work as it should be right now.
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708070830
rw_201708070830
Create a snapshot of 'mbroken_201708070830' in './rw_201708070830'
[root@backuplogC7 mariadb]# btrfs sub list .
ID 257 gen 542 top level 5 path mbroken
ID 317 gen 576 top level 5 path mbroken_201708070830
ID 318 gen 568 top level 5 path mbroken_201708080830
ID 319 gen 569 top level 5 path mbroken_201708090830
ID 320 gen 570 top level 5 path mbroken_201708100830
ID 321 gen 571 top level 5 path mbroken_201708110830
ID 322 gen 572 top level 5 path mbroken_201708120830
ID 323 gen 573 top level 5 path mbroken_201708130830
ID 324 gen 543 top level 5 path mysql
ID 348 gen 576 top level 5 path rw_201708070830
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708080830
rw_201708080830
Create a snapshot of 'mbroken_201708080830' in './rw_201708080830'
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708090830
rw_201708090830
Create a snapshot of 'mbroken_201708090830' in './rw_201708090830'
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708100830
rw_201708100830
Create a snapshot of 'mbroken_201708100830' in './rw_201708100830'
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708110830
rw_201708110830
Create a snapshot of 'mbroken_201708110830' in './rw_201708110830'
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708120830
rw_201708120830
Create a snapshot of 'mbroken_201708120830' in './rw_201708120830'
[root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708130830
rw_201708130830
Create a snapshot of 'mbroken_201708130830' in './rw_201708130830'
[root@backuplogC7 mariadb]# btrfs sub list .
ID 257 gen 542 top level 5 path mbroken
ID 317 gen 576 top level 5 path mbroken_201708070830
ID 318 gen 577 top level 5 path mbroken_201708080830
ID 319 gen 578 top level 5 path mbroken_201708090830
ID 320 gen 579 top level 5 path mbroken_201708100830
ID 321 gen 580 top level 5 path mbroken_201708110830
ID 322 gen 581 top level 5 path mbroken_201708120830
ID 323 gen 582 top level 5 path mbroken_201708130830
ID 324 gen 543 top level 5 path mysql
ID 348 gen 576 top level 5 path rw_201708070830
ID 349 gen 577 top level 5 path rw_201708080830
ID 350 gen 578 top level 5 path rw_201708090830
ID 351 gen 579 top level 5 path rw_201708100830
ID 352 gen 580 top level 5 path rw_201708110830
ID 353 gen 581 top level 5 path rw_201708120830
ID 354 gen 582 top level 5 path rw_201708130830
[root@backuplogC7 mariadb]# btrfs subvolume list -a -R . | grep
"3ad0334a-4063-654c-add6-b1cbcdeaa639"
ID 257 gen 542 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken
ID 317 gen 576 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708070830
ID 318 gen 577 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708080830
ID 319 gen 578 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708090830
ID 320 gen 579 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708100830
ID 321 gen 580 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708110830
ID 322 gen 581 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708120830
ID 323 gen 582 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708130830
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708070830 mysql_201708070830
Create a readonly snapshot of 'rw_201708070830' in './mysql_201708070830'
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708080830 mysql_201708080830
Create a readonly snapshot of 'rw_201708080830' in './mysql_201708080830'
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708090830 mysql_201708090830
Create a readonly snapshot of 'rw_201708090830' in './mysql_201708090830'
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708100830 mysql_201708100830
Create a readonly snapshot of 'rw_201708100830' in './mysql_201708100830'
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708110830 mysql_201708110830
Create a readonly snapshot of 'rw_201708110830' in './mysql_201708110830'
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708120830 mysql_201708120830
Create a readonly snapshot of 'rw_201708120830' in './mysql_201708120830'
[root@backuplogC7 mariadb]# btrfs sub snap -r rw_201708130830 mysql_201708130830
Create a readonly snapshot of 'rw_201708130830' in './mysql_201708130830'
[root@backuplogC7 mariadb]# btrfs sub list .
ID 257 gen 542 top level 5 path mbroken
ID 317 gen 576 top level 5 path mbroken_201708070830
ID 318 gen 577 top level 5 path mbroken_201708080830
ID 319 gen 578 top level 5 path mbroken_201708090830
ID 320 gen 579 top level 5 path mbroken_201708100830
ID 321 gen 580 top level 5 path mbroken_201708110830
ID 322 gen 581 top level 5 path mbroken_201708120830
ID 323 gen 582 top level 5 path mbroken_201708130830
ID 324 gen 584 top level 5 path mysql
ID 348 gen 583 top level 5 path rw_201708070830
ID 349 gen 584 top level 5 path rw_201708080830
ID 350 gen 585 top level 5 path rw_201708090830
ID 351 gen 586 top level 5 path rw_201708100830
ID 352 gen 587 top level 5 path rw_201708110830
ID 353 gen 588 top level 5 path rw_201708120830
ID 354 gen 589 top level 5 path rw_201708130830
ID 355 gen 583 top level 5 path mysql_201708070830
ID 356 gen 584 top level 5 path mysql_201708080830
ID 357 gen 585 top level 5 path mysql_201708090830
ID 358 gen 586 top level 5 path mysql_201708100830
ID 359 gen 587 top level 5 path mysql_201708110830
ID 360 gen 588 top level 5 path mysql_201708120830
ID 361 gen 589 top level 5 path mysql_201708130830
[root@backuplogC7 mariadb]# btrfs subvolume list -a -R . | grep
"3ad0334a-4063-654c-add6-b1cbcdeaa639"
ID 257 gen 542 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken
ID 317 gen 576 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708070830
ID 318 gen 577 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708080830
ID 319 gen 578 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708090830
ID 320 gen 579 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708100830
ID 321 gen 580 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708110830
ID 322 gen 581 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708120830
ID 323 gen 582 top level 5 received_uuid 3ad0334a-4063-654c-add6-b1cbcdeaa639 path
mbroken_201708130830
[root@backuplogC7 mariadb]# btrfs send /var/lib/mariadb/mysql_201708070830 | ssh
192.168.45.166 btrfs receive /var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708070830
At subvol mysql_201708070830
[root@backuplogC7 mariadb]# btrfs sub show mysql_201708070830
/var/lib/mariadb/mysql_201708070830
Name: mysql_201708070830
UUID: 70ee3c31-126d-574a-814c-e3b4c81b414e
Parent UUID: 1d5bb8eb-b0df-2549-8b62-552cfa517609
Received UUID: -
Creation time: 2017-08-14 07:00:08 +0700
Subvolume ID: 355
Generation: 583
Gen at creation: 583
Parent ID: 5
Top level ID: 5
Flags: readonly
Snapshot(s):
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708070830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708070830/
sending incremental file list
./
sent 3773 bytes received 19 bytes 1083.43 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 mariadb]# btrfs send -p /var/lib/mariadb/mysql_201708070830
/var/lib/mariadb/mysql_201708080830 | ssh 192.168.45.166 btrfs receive
/var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708080830
At snapshot mysql_201708080830
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708080830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708080830/
sending incremental file list
./
sent 3769 bytes received 19 bytes 688.73 bytes/sec
total size is 718361496 speedup is 189641.37 (DRY RUN)
[root@backuplogC7 mariadb]# btrfs send -p /var/lib/mariadb/mysql_201708080830
/var/lib/mariadb/mysql_201708090830 | ssh 192.168.45.166 btrfs receive
/var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708090830
At snapshot mysql_201708090830
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708090830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708090830/
sending incremental file list
./
sent 3773 bytes received 19 bytes 583.38 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 mariadb]# btrfs send -p /var/lib/mariadb/mysql_201708090830
/var/lib/mariadb/mysql_201708100830 | ssh 192.168.45.166 btrfs receive
/var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708100830
At snapshot mysql_201708100830
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708100830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708100830/
sending incremental file list
./
sent 3773 bytes received 19 bytes 689.45 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 mariadb]# btrfs send -p /var/lib/mariadb/mysql_201708100830
/var/lib/mariadb/mysql_201708110830 | ssh 192.168.45.166 btrfs receive
/var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708110830
At snapshot mysql_201708110830
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708110830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708110830/
sending incremental file list
./
sent 3773 bytes received 19 bytes 689.45 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 mariadb]# btrfs send -p /var/lib/mariadb/mysql_201708110830
/var/lib/mariadb/mysql_201708120830 | ssh 192.168.45.166 btrfs receive
/var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708120830
At snapshot mysql_201708120830
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708120830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708120830/
sending incremental file list
./
sent 3773 bytes received 19 bytes 689.45 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 mariadb]# btrfs send -p /var/lib/mariadb/mysql_201708120830
/var/lib/mariadb/mysql_201708130830 | ssh 192.168.45.166 btrfs receive
/var/lib/mariadb
At subvol /var/lib/mariadb/mysql_201708130830
At snapshot mysql_201708130830
[root@backuplogC7 mariadb]# rsync -avnc /var/lib/mariadb/mysql_201708130830/
root@192.168.45.166:/var/lib/mariadb/mysql_201708130830/
sending incremental file list
./
sent 3773 bytes received 19 bytes 689.45 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 mariadb]#
Best Regards,
Siranee Jaraswachirakul.
> On Sun, Aug 13, 2017 at 4:52 AM, <siranee.ja@xxxxxxxxx> wrote:
>> Hi "A L",
>>
>> [root@backuplogC7 ~]# btrfs sub show /var/lib/mariadb/mysql
>> /var/lib/mariadb/mysql
>> Name: mysql
>> UUID: 92f319c5-e132-3249-9b13-d39ee77a2b44
>> Parent UUID: -
>> Received UUID: 3ad0334a-4063-654c-add6-b1cbcdeaa639
>> Creation time: 2017-06-21 13:27:41 +0700
>> Subvolume ID: 257
>> Generation: 539
>> Gen at creation: 9
>> Parent ID: 5
>> Top level ID: 5
>> Flags: -
>> Snapshot(s):
>> mysql_201708060830
>> mysql_201708070830
>> mysql_201708080830
>> mysql_201708090830
>> mysql_201708100830
>> mysql_201708110830
>> mysql_201708120830
>> mysql_201708130830
>>
>> yes I think it has Received UUID because I restored the source from snapshot
>> mysql_201708040830 for prove that the local snapshot was work.
>>
>> How to clear the Received UUID ?
>> What to do next?
>
>
> I'm using btrfs-progs 4.12, and I just did a btrfs send/receive from
> file system A to B; and then on B I took a rw snapshot of the ro
> snapshot. The ro snapshot has Received UUID, but the rw snapshot made
> from it does not have Received UUID. So now I'm confused how you have
> a rw snapshot with Received UUID set.
>
>
> Did you ever use 'btrfs property set' to change a ro snapshot to rw?
> That's the only way I can think it's possible. The only other thing is
> maybe the behavior has changed since btrfs-progs 4.4.
>
> It is possible this behavior has changed since btrfs-progs 4.4. The
> changelogs shows there are improvements in send/receive in particular
> 4.8.3 and 4.8.4, but also others. I have no idea which are related.
> But anyway, this is one of the reasons why the expert users on this
> almost always say use something newer because it's just too hard to
> remember, even with changelogs, what's fixed and where.
>
> My suggestion is to investigate moving to kernel 4.9 series; and it
> should be safe to move to btrfs-progs 4.12 now. Any new features in
> 4.12 that can't be supported with an older kernel should fail
> gracefully.
>
> No matter what, you must have separate backups. You can't depend
> exclusively on one backup, no matter the method. It's fine to use
> send/receive for backup1. But backup2 should be a conventional backup,
> e.g. XFS with rsync. Basically this is a game of risk and the more
> independent backups you have, the more failure cases (especially user
> error) you can recover from, at the expense of some complexity.
>
>
>
> --
> Chris Murphy
>
--
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