Automatically rotate MongoDb collections periodically

php Xiaobian Zimo regularly automatically rotates MongoDb collections is an effective method to optimize database performance. By rotating collections regularly, you can avoid performance degradation caused by excessive data growth. During the rotation process, old collections can be archived or deleted, and new collections can be created to store the latest data. This keeps the database clean and efficient, improving query speed and response time. Regularly automatically rotating MongoDb collections is an important strategy for database management and is of great significance to maintaining the stability and reliability of the system.

Question content

Suppose I have a mongo collection ("resultData"). I want to do a monthly collection rotation (similar to log rotation or archiving) and automatically rename the old collection to "{{old_collection_name}}_{{month_year}}".

This will help me keep all the data without increasing the size of the collection.

Note: I use golang for development.

Workaround

In mongodb, a collection does not need to exist before being used: you can insert a collection that does not yet exist and it will be created automatically.

So a simple and automatic solution is to always use a collection whose name is generated by the current month. So as soon as a new month starts (named after the month), the documents are inserted into the new collection.

Here is a simple helper to implement this logic:

func getresultcoll(db *mongo.database) *mongo.collection {
    name := "resultdata_" + time.now().format("01_2006")
    return db.collection(name)
}

This month (November 2022) this function returns a collection named resultdata_11_2022. Next month, the returned collection name will be resultdata_12_2022.

use it:

var db *mongo.Database // initialize your Mongo DB

c := getResultColl(db)

if _, err := c.InsertOne(ctx, resultData); err != nil {
    // Handle error
}

Tip: If you move the year before the month, the alphabetical order of the collection will be the same as the chronological order. So I suggest to use "2006_01" format (layout) instead of "01_2006".

Also note that there is nothing wrong with having many documents in a collection. You can simply add month as a field to the document and you can filter the results by month if needed, there will be no slowdown using the index. You can even do this without extra adding the month if you also store the timestamp or use objectid as _id.

The above is the detailed content of Automatically rotate MongoDb collections periodically. For more information, please follow other related articles on the PHP Chinese website!