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PXC_Strict_Mode.md

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PXC Strict Mode

PXC Strict Mode is designed to avoid the use of experimental and unsupported features in Percona XtraDB Cluster. It performs a number of validations at startup and during runtime.

  • DISABLED: Do not perform strict mode validations and run as normal.
  • PERMISSIVE: If a vaidation fails, log a warning and continue running as normal.
  • ENFORCING: If a validation fails during startup, halt the server and throw an error. If a validation fails during runtime, deny the operation and throw an error.
  • MASTER: The same as ENFORCING except that the validation of explicit table locking is not performed. This mode can be used with clusters in which write operations are isolated to a single node.

By default, PXC Strict Mode is set to ENFORCING, except if the node is acting as a standalone server or the node is bootstrapping, then PXC Strict Mode defaults to DISABLED.

https://www.percona.com/doc/percona-xtradb-cluster/5.7/features/pxc-strict-mode.html#validations

 `CREATE TABLE sbtest100 (`
  id int(10) unsigned NOT NULL AUTO_INCREMENT,
  k int(10) unsigned NOT NULL DEFAULT '0',
  c char(120) NOT NULL DEFAULT '',
  pad char(60) NOT NULL DEFAULT '',
  KEY k_1 (k)
`) ENGINE=InnoDB;`