ZRM Enterprise Edition 3.9.4 Release Notes

Enhancements:

  • ZRM Enterprise Edition 3.9.4 extends its support to include RHEL-9 (Red Hat Enterprise Linux 9) and OEL-9 (Oracle Enterprise Linux 9).

  • Upgraded Zmanda services to use systemd instead of xinetd/init.d.

General Availability

ZRM Enterprise Edition 3.9.4 is now officially released and available for download at Welcome to the Zmanda Network.

Upgrade Instructions:

Note:

  • Ensure you make a backup of the /etc/mysql-zrm/mysql-zrm.conf* files on the ZRM server before upgrading.

  • If these files have been modified, you may need to manually merge the changes after the upgrade.

  • Before upgrading, stop MySQL services using the command: systemctl stop mysqld

Note: If upgrading from versions prior to 3.9.4, stop the xinetdservice to prevent issues with the mysql-zrm-server.socket binding to systemd. Use the command: systemctl stop xinetd.

  • Users can upgrade to ZRM Enterprise Edition 3.9.4 from the previous 3.9.x versions by running the ZRM server 3.9.4 installer. The installer will automatically detect the presence of an earlier installation and prompt the user for the upgrade while preserving existing configurations.

  • After the upgrade: Install any required dependencies with yum install [dependencies], start MySQL services using systemctl start mysqld, and confirm the upgrade was successful by checking the ZRM version with zrm-version.

  • Confirm if Mydumper is running with ps -ef | grep mydumper, remove it using yum remove mydumper, and install the version provided in NZ utilities as specified in their installation guide.

  • Restart the zmc_zrm.service and mysql-zrm-server.socket by executing: systemctl restart zmc_zrm.service mysql-zrm-server.socket.

Commands Updated (Transition to systemd):

  • For checking the status of ZRM services, replace the old command service zmc_zrm status with the new command zrm-status.

  • To start, stop, or restart ZRM services, replace the previous commands /etc/init.d/zmc_zrm start, /etc/init.d/zmc_zrm stop with systemctl start zmc_zrm.service, systemctl stop zmc_zrm.service, and systemctl restart zmc_zrm.service respectively.

Compatibility with Previous Versions:

  • ZRM Enterprise 3.9.4 is backward compatible with ZRM Windows Client 3.8. However, users should clear their browser cache before accessing the Zmanda Management Console post-upgrade to prevent loading components from the older version.

Support for Database Servers:

  • Continues support for MySQL 8.0, MariaDB 10.1 to 10.5, MySQL-Cluster 8.0, Mariabackup 10.x, Xtrabackup 8.0, MySQL Enterprise Backup 4.1, 8.0, and MyDumper 0.9.5.

Table Level Restore:

  • The capability for table level restore from database backups remains available in ZMC for MySQL 5.6 or later servers, supported by logical, parallel logical, MySQL Enterprise Backup, and Xtrabackup backup methods.

Defect Fixes:

  • Numerous defect fixes enhancing the stability and performance of the ZRM Enterprise Edition.

Amanda Compatibility:

  • ZRM Enterprise 3.9.4 continues to be compatible with Amanda Enterprise 3.3.x. Users installing both products on the same server should follow the specified order and permissions settings to ensure proper configuration and operation.

For detailed upgrade instructions and support, please refer to the ZRM manuals or contact our support team.

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