Have you checked that there is no Received UUID on the source subvolume?
# btrfs sub show volume/mysql/
volume/mysql
Name: mysql
UUID: 8a94524e-a956-c14b-bb8d-d453627f27d5
Parent UUID: -
Received UUID: -
Creation time: 2017-04-17 11:46:20 +0200
Subvolume ID: 1469
Generation: 122934
Gen at creation: 78671
Parent ID: 5
Top level ID: 5
Flags: -
Snapshot(s):
There is no Received UUID here. If it has, then btrfs send-receive will
have problems, since all snapshots of the source subvolume will have the
same Received UUID and it can't tell the differences between the snapshots.
On 8/13/2017 5:40 AM, siranee...@tpc.co.th wrote:
Hi Chris,
I started as your suggestion again. The diff occured since snapshot
mysql_201708090830 manually send. What should I do next?
- delete all the bad/mismatching snapshots only on the destination computer.
[root@joytest ~]# date
Sun Aug 13 10:27:23 ICT 2017
[root@joytest ~]# cd /var/lib/mariadb
[root@joytest mariadb]# btrfs sub list .
ID 313 gen 220 top level 5 path mysql_201708070830
ID 316 gen 199 top level 5 path mysql_201708080830
ID 318 gen 205 top level 5 path mysql_201708090830
ID 320 gen 211 top level 5 path mysql_201708100830
ID 322 gen 219 top level 5 path mysql_201708110830
ID 323 gen 219 top level 5 path mysql_201708120830
ID 324 gen 224 top level 5 path mysql_201708130830
ID 325 gen 225 top level 5 path mysql
[root@joytest mariadb]# btrfs sub del mysql_201708130830
Delete subvolume (no-commit): '/var/lib/mariadb/mysql_201708130830'
[root@joytest mariadb]# btrfs sub del mysql_201708120830
Delete subvolume (no-commit): '/var/lib/mariadb/mysql_201708120830'
[root@joytest mariadb]# btrfs sub del mysql_201708110830
Delete subvolume (no-commit): '/var/lib/mariadb/mysql_201708110830'
[root@joytest mariadb]# btrfs sub del mysql_201708100830
Delete subvolume (no-commit): '/var/lib/mariadb/mysql_201708100830'
[root@joytest mariadb]# btrfs sub del mysql_201708090830
Delete subvolume (no-commit): '/var/lib/mariadb/mysql_201708090830'
[root@joytest mariadb]# btrfs sub sync .
[root@joytest mariadb]# systemctl status mariadb
â— mariadb.service - MariaDB database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor
preset:
disabled)
Active: failed (Result: exit-code) since Sun 2017-08-13 09:07:00 ICT; 1h
24min ago
Process: 19871 ExecStartPost=/usr/libexec/mariadb-wait-ready $MAINPID
(code=exited, status=1/FAILURE)
Process: 19870 ExecStart=/usr/bin/mysqld_safe --basedir=/usr (code=exited,
status=0/SUCCESS)
Process: 19842 ExecStartPre=/usr/libexec/mariadb-prepare-db-dir %n
(code=exited,
status=0/SUCCESS)
Main PID: 19870 (code=exited, status=0/SUCCESS)
Aug 13 09:06:58 joytest systemd[1]: Starting MariaDB database server...
Aug 13 09:06:58 joytest mysqld_safe[19870]: 170813 09:06:58 mysqld_safe Logging
to
'/var/log/mariadb/mariadb.log'.
Aug 13 09:06:58 joytest mysqld_safe[19870]: 170813 09:06:58 mysqld_safe Starting
mysqld daemon with databases from /var/lib/mariadb/mysql
Aug 13 09:07:00 joytest systemd[1]: mariadb.service: control process exited,
code=exited status=1
Aug 13 09:07:00 joytest systemd[1]: Failed to start MariaDB database server.
Aug 13 09:07:00 joytest systemd[1]: Unit mariadb.service entered failed state.
Aug 13 09:07:00 joytest systemd[1]: mariadb.service failed.
[root@joytest mariadb]# btrfs sub list .
ID 313 gen 220 top level 5 path mysql_201708070830
ID 316 gen 199 top level 5 path mysql_201708080830
ID 325 gen 225 top level 5 path mysql
[root@joytest mariadb]#
- The most recent good snapshot pair, which rsync shows origin and
destination match, is mysql_201708080830 so you can keep that one on
both sides.
[root@backuplogC7 ~]# btrfs sub list /var/lib/mariadb
ID 257 gen 538 top level 5 path mysql
ID 316 gen 498 top level 5 path mysql_201708060830
ID 317 gen 503 top level 5 path mysql_201708070830
ID 318 gen 507 top level 5 path mysql_201708080830
ID 319 gen 514 top level 5 path mysql_201708090830
ID 320 gen 524 top level 5 path mysql_201708100830
ID 321 gen 529 top level 5 path mysql_201708110830
ID 322 gen 533 top level 5 path mysql_201708120830
ID 323 gen 538 top level 5 path mysql_201708130830
[root@backuplogC7 ~]# 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 842.67 bytes/sec
total size is 718361496 speedup is 189441.32 (DRY RUN)
[root@backuplogC7 ~]# 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 841.78 bytes/sec
total size is 718361496 speedup is 189641.37 (DRY RUN)
[root@backuplogC7 ~]# date
Sun Aug 13 10:34:05 ICT 2017
[root@backuplogC7 ~]#
- manually do incremental send/receive, starting with
mysql_201708090830/, to make the destination current again with the
origin.
[root@backuplogC7 ~]# 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 ~]# rsync -avnc /var/lib/mariadb/mysql_201708090830/
root@192.168.45.166://var/lib/mariadb/mysql_201708090830/
sending incremental file list
./
ib_logfile1
ibdata1
sent 3779 bytes received 25 bytes 507.20 bytes/sec
total size is 718361496 speedup is 188843.72 (DRY RUN)
[root@backuplogC7 ~]#
Best Regards,
Siranee Jaraswachirakul.
On Sat, Aug 12, 2017 at 8:20 PM, <siranee...@tpc.co.th> wrote:
[root@backuplogC7 ~]# rsync -avnc /var/lib/mariadb/mysql_201708090830
root@192.168.45.166://var/lib/mariadb/mysql_201708090830
You need trailing / for the first directory with -a option.
rsync -a dir dir
is not the same command as
rsync -a dir/ dir
It's confusing but your command is trying to create mysql_201708090830
directory on the source, in the mysql_201708090830 on the destination.
That is why everything mismatches. To make it mean "contents of" you
need trailing slash on at least the origin.
--
Chris Murphy
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