The Ultimate Guide to High Availability with MariaDB
This is a read-only copy of the MariaDB Knowledgebase generated on 2024-11-21. For the latest, interactive version please visit https://mariadb.com/kb/.

ROTATE_EVENT

When a binary log file exceeds the configured size limit, a ROTATE_EVENT is written at the end of the file, pointing to the next file in the sequence.

ROTATE_EVENT is generated locally and written to the binary log on the master and it's also written when a FLUSH LOGS statement occurs on the master server.

The ROTATE_EVENT is sent to the connected slave servers.

  • The Event Type is set ROTATE_EVENT (0x4)

Fields

  • uint<8> The position of the first event in the next log file. Note: it always contains the number 4 (meaning the next event starts at position 4 in the next binary log).
  • string<EOF> The next binary log name. The filename is not null-terminated.

Example of Transmission With CRC32 (The Last 4 Bytes)

T 127.0.0.1:8808 -> 127.0.0.1:57157 [AP]
  30 00 00 4d 00 bc 4e 21    5a 04 d9 27 00 00 2f 00    0..M..N!Z..'../.
  00 00 c0 01 00 00 00 00    04 00 00 00 00 00 00 00    ................
  6d 79 73 71 6c 2d 62 69    6e 2e 30 30 30 30 31 39    mysql-bin.000019
  b2 bc db bf                                           ....
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.