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This article mainly explains "how to prevent database data loss". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought. Let's study and learn "how to prevent database data loss"!

For example, the old core was called IK.

The path to create the configuration file is / home/collection1

Copy the updated schema.xml to / home/collection1/conf

Then use the following command:

Solrtcl instancedir-update IK / home/collection1

Solrctl collection-reload IK

So that the previous data can not be lost.

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