为什么蒙古恢复恢复索引？

Question

在文件https://www.mongodb.com/docs/database-tools/mongodump/#data-exclusion中，有以下说明：

mongodump output only captures the documents in the database and does not include index data. mongorestore or mongod must then rebuild the indexes after restoring data.

但是当我运行命令mongorestore --host=127.0.0.1:27018 --db=%dbname% --dir=%backup_path% --drop --objcheck --writeConcern="{w:1, wtimeout:500}" --stopOnError -vvvvv时有输出

2022-05-05T11:41:24.611+0800    restoring indexes for collection mongodb.FunctionParam from metadata
2022-05-05T11:41:24.611+0800    index: &idx.IndexDocument{Options:primitive.M{"background":true, "name":"id_1", "unique":true, "v":2}, Key:primitive.D{primitive.E{Key:"id", Value:1}}, PartialFilterExpression:primitive.D(nil)}
2022-05-05T11:41:24.612+0800            run create Index command for indexes: id_1

Answer 1

默认情况下，如果出于某种原因希望仅还原数据，则可以添加以下选项：

 --noIndexRestore

这将阻止mongorestore恢复和构建相应的mongodump输出中指定的索引。

官方monogDB文档