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mysqlbinlog --read-from-remote-server --host=localhost mariadb-bin.000001 -p --raw --stop-never

Hello, I have an master /slave replication, and I would like to backup binlogs on the master server. mysqlbinlog --read-from-remote-server --host=localhost mariadb-bin.000001 -p --raw --stop-never --result-file=$(date +%F)

I would like if the binlog at the database and at backup to be in sync. I do not know , why the backuped binlog and database binlog differ in size and content.

MariaDB [mysql]> system ls -ltr /backup/binlog/@2021*mariadb-bin.000005 -rw-r--r--. 1 root root 16384 Jan 28 08:25 /backup/binlog/@2021-01-26mariadb-bin.000005 MariaDB [mysql]> system ls -ltr /var/lib/mysql/mariadb-bin.000005 -rw-rw----. 1 mysql mysql 17073 Jan 28 08:24 /var/lib/mysql/mariadb-bin.000005 MariaDB [mysql]> insert into almafa values('korte'); Query OK, 1 row affected (0.003 sec)

MariaDB [mysql]> insert into almafa values('korte'); ---->9 times Query OK, 1 row affected (0.003 sec)

MariaDB [mysql]> system ls -ltr /backup/binlog/@2021*mariadb-bin.000005 -rw-r--r--. 1 root root 16384 Jan 28 08:25 /backup/binlog/@2021-01-26mariadb-bin.000005 MariaDB [mysql]> system ls -ltr /var/lib/mysql/mariadb-bin.000005 -rw-rw----. 1 mysql mysql 18823 Jan 28 09:10 /var/lib/mysql/mariadb-bin.000005 MariaDB [mysql]> insert into almafa values('korte'); ------>9 times Query OK, 1 row affected (0.003 sec)

MariaDB [mysql]> system ls -ltr /backup/binlog/@2021*mariadb-bin.000005 -rw-r--r--. 1 root root 16384 Jan 28 08:25 /backup/binlog/@2021-01-26mariadb-bin.000005 MariaDB [mysql]> system ls -ltr /var/lib/mysql/mariadb-bin.000005 -rw-rw----. 1 mysql mysql 20398 Jan 28 09:10 /var/lib/mysql/mariadb-bin.000005 MariaDB [mysql]> insert into almafa values('korte'); ----->11 times Query OK, 1 row affected (0.003 sec)

MariaDB [mysql]> system ls -ltr /backup/binlog/@2021*mariadb-bin.000005 -rw-r--r--. 1 root root 16384 Jan 28 08:25 /backup/binlog/@2021-01-26mariadb-bin.000005 MariaDB [mysql]> system ls -ltr /var/lib/mysql/mariadb-bin.000005 -rw-rw----. 1 mysql mysql 22323 Jan 28 09:11 /var/lib/mysql/mariadb-bin.000005 MariaDB [mysql]> insert into almafa values('korte'); ----->9 times Query OK, 1 row affected (0.002 sec)

MariaDB [mysql]> system ls -ltr /backup/binlog/@2021*mariadb-bin.000005 -rw-r--r--. 1 root root 16384 Jan 28 08:25 /backup/binlog/@2021-01-26mariadb-bin.000005 MariaDB [mysql]> system ls -ltr /var/lib/mysql/mariadb-bin.000005 -rw-rw----. 1 mysql mysql 23898 Jan 28 09:12 /var/lib/mysql/mariadb-bin.000005 MariaDB [mysql]> insert into almafa values('korte'); ----->7 times Query OK, 1 row affected (0.002 sec)

MariaDB [mysql]> system ls -ltr /backup/binlog/@2021*mariadb-bin.000005 -rw-r--r--. 1 root root 24576 Jan 28 2021 /backup/binlog/@2021-01-26mariadb-bin.000005 MariaDB [mysql]> system ls -ltr /var/lib/mysql/mariadb-bin.000005 -rw-rw----. 1 mysql mysql 25123 Jan 28 09:12 /var/lib/mysql/mariadb-bin.000005 MariaDB [mysql]>

[mysql]# mysqlbinlog mariadb-bin.000005|tail -20

  1. 210128 9:12:33 server id 1 end_log_pos 24948 CRC32 0x4e467693 Xid = 278 COMMIT/*!*/;
  2. at 24948
  3. 210128 9:12:37 server id 1 end_log_pos 24990 CRC32 0xf96df3a5 GTID 0-1-606 trans /*!100001 SET @@session.gtid_seq_no=606**!*/; START TRANSACTION /*!*/;
  4. at 24990
  5. 210128 9:12:37 server id 1 end_log_pos 25092 CRC32 0x822fe2db Query thread_id=10 exec_time=0 error_code=0 SET TIMESTAMP=1611821557/*!*/; insert into almafa values('korte') /*!*/;
  6. at 25092
  7. 210128 9:12:37 server id 1 end_log_pos 25123 CRC32 0x1ca110db Xid = 279 COMMIT/*!*/; DELIMITER ;
  8. End of log file

[backup]# mysqlbinlog 2021-01-26mariadb-bin.000005|tail -20 ERROR: Error in Log_event::read_log_event(): 'Event truncated' ERROR: Could not read entry at offset 24567: Error in log format or read error. START TRANSACTION /*!*/;

  1. at 24290
  2. 210128 9:12:24 server id 1 end_log_pos 24392 CRC32 0xf2767a00 Query thread_id=10 exec_time=0 error_code=0 SET TIMESTAMP=1611821544/*!*/; insert into almafa values('korte') /*!*/;
  3. at 24392
  4. 210128 9:12:24 server id 1 end_log_pos 24423 CRC32 0x1390e641 Xid = 275 COMMIT/*!*/;
  5. at 24423
  6. 210128 9:12:27 server id 1 end_log_pos 24465 CRC32 0x5f32f79c GTID 0-1-603 trans /*!100001 SET @@session.gtid_seq_no=603**!*/; START TRANSACTION /*!*/;
  7. at 24465
  8. 210128 9:12:27 server id 1 end_log_pos 24567 CRC32 0xf05d3b40 Query thread_id=10 exec_time=0 error_code=0 SET TIMESTAMP=1611821547/*!*/; insert into almafa values('korte') /*!*/;

Thank you for your answere. Szilvia

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