Encrypting Doublewrite Buffers¶
As of Percona Server for MySQL 8.0.20-11, the Percona version of the doublewrite buffer is replaced with the MySQL implementation.
Until MySQL 8.0.20, the system tablespace contained the doublewrite
buffer. The key which encrypts the InnoDB system tablespace also
encrypts the doublewrite buffer
pages.
Currently, Percona encrypts the doublewrite buffer
using innodb_parallel_dblwr_encrypt
.
Encrypted tablespace pages are written as encrypted in the
doublewrite buffer using their respective tablespace keys. Unencrypted tablespace pages are not encrypted in the
doublewrite buffer.
- variable
innodb_parallel_dblwr_encrypt
¶
Command Line: --innodb-parallel-dblwr-encrypt
Dynamic: Yes Scope: Global Variable Type: Boolean Default Value: OFF
Enables the encryption of the doublewrite buffer. The encryption uses the key of the tablespace where the doublewrite buffer is used.
See also
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