MarkLogic Server Version Downgrades are Not Supported
09 May 2021 06:22 PM
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Summary Version downgrades are not supported by MarkLogic Server. Backup your configuration files before you do anything elsePlease ensure you have all your current configuration files backed up. Each host in a MarkLogic cluster is configured using parameters which are stored in XML Documents that are available on each host. These are usually relatively small files and will zip up to a manageable size. If you cd to your "Data" directory (on Linux this is /var/opt/MarkLogic; on Windows this is C:\Program Files\MarkLogic\Data and on OS X this is /Users/{username}/Library/Application Support/MarkLogic), you should see several xml files (assignments, clusters, databases, groups, hosts, server). Whenever MarkLogic updates any of these files, it creates a backup using the same naming convention used for older ErrorLog files (_1, _2 etc). We recommend backing up all configuration files before following the steps under the next heading. Upgrade Guidelines:If you follow these upgrade guidelines and recommendations, then it is unlikely that you will need to downgrade your MarkLogic Server instance.
Back-out Plan Although it is not expected that you will ever need to back out a version upgrade of MarkLogic Server, it is always prudent to have a contingency plan for the worst case scenario. Before an upgrade, you will want to
In the unlikely event you want to restore your system to a previous version level, you will need to first make a decision regarding the data in your databases.
Once you have decided how to handle your data, you will need to recreate your MarkLogic Instance from a fresh install. This can be done on fresh hardware, or in place if you are careful with your data. The steps will include
In addition to testing an upgrade, you should also test your Back-Out Plan. | ||
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