Database

  1. updateMany limit

    When porting an application backend from an RDBMS to MongoDB, we've spoken to two people who've are looking for a way to specify a limit on the number of documents in .updateMany(). I understand the behavior cannot be defined on a sharded cluster, but if we had a way to do this on an unsharded collection, that would help when dealing with these teams.

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  2. Add an option for $addToSet to use a specific field in the array for uniqueness

    Currently, the $addToSet for upserting to an array checks for object equality (when the array elements are objects). We sometimes need to check for uniqueness based on a specific field of the object rather than the object as a whole, and the only way to do this is to force single-threaded operation and to use $pull and $push.

    If there is a way to specify the field to check uniqueness for the $addToSet , we would be able to perform writes normally.

    1 vote

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  3. Extended JSON

    Add support for Extended JSON (EJSON. For example, {$date: "2021-01-01T00:00:00.000Z"} ) such that we do not have to resort to using the ISODate helper function in the MongoDB Shell and in Compass.

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  4. Arrow function support

    Is there any plan to implement arrow functions support?
    The current way to use functions (BSON type 13) is using traditional javascript functions:

    function() {
    ...
    emit(key, value);
    }

    It would be great to support also arrow functions:

    () => {
    ...
    emit(key, value);
    }

    1 vote

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  5. options for different compute configuration per shards

    Can we have options for different compute configuration per shards?

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  6. 4.4 to the EU on regular instance for development!

    I work on mongodb in the EU.. i want to use the atlas search but i also need some features of v4.4

    In development and for general everyday projects where our clients don't have large user bases we generally go for M2 instances.. affordable while offering full text search.

    The release of 4.4 is almost half a year old.. when will we see 4.4 released to the EU of regular M2 instances??

    1 vote

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  7. Bundle rest service together DB

    As per current industry practice, REST/Json became standard way to deal with the data between the FE application and Backend DB. So if REST the server/service is bundled with DB it would eliminate the need of a middleware tier in most cases.

    It means we can directly fetch data from a frontend application using REST/Json from mongoDB without requiring a thirdparty service.

    1 vote

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  8. EDGE

    Localisation

    1 vote

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  9. Allow custom autoscaling policies

    Currently this is the following autoscaling policy in mongo:

    Please note, if the next highest cluster tier is within your Maximum Cluster Size range, Atlas scales the cluster up to the next tier if one of the following is true for any node in the cluster:

    Average CPU Utilization has exceeded 75% for the past hour, or
    Memory Utilization has exceeded 75% for the past hour.

    The feature request is to allow a DBA to setup custom autoscaling policy

    1 vote

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  10. Conditional TTL index

    In case of auto purging sometimes user might want to ensure data has been archived before purging. If conditional TTL was allowed user could set value of a field to indicate document has been archived and then db can purge accordingly.

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  11. collections under a document as in firebase firestore

    collections under a document as in firebase firestore

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  12. Allow parallel migrations to be throttled

    This request is for a tuneable parameter to allow the number of parallel chunk migrations to be limited.

    1 vote

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  13. String Json Parser

    lately, I imported a big CSV file, containing fields with values of Json object in String format, the simplest way to parse those strings to object it was by doing find().forEach( JSON.pase then update) it taken too much time to update the collection the only think that i have could done to reduce the latency is putting write priority to 0 which isn't very advisable with high throughput of updates, I don't really know for sure I'am not the expert here but working with big data demand a lot of cleaning, and not being able to do the cleaning on…

    1 vote

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  14. TTL expiration on embedded subdocs

    TTL expiration on an embedded subdoc will delete the parent/root doc.

    Provide an option to only delete the subdocument on expiration.

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  15. Allow collection collation to be editable

    Collation of a collection can be set at creation time only. It would be useful to edit these fields to avoid creating an entire new collection and copying the collection over.

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  16. Validation for referential integrity

    Currently, with the JSON Schema validation, we are able to limit the values for a field using enumerations. However, we need to have a way to limit the values to those entered in another collection.

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  17. Ability to view and track collection wise transactions (read,write,success,failures)

    We have multiple microservices using the same collection and we'd like to track how many calls come from each, and also understand which transactions are successful or not.
    Ultimately this will allow us to understand the MDB usage by each of the microservices.
    [setting verbose logging level to 1 and then using these logs to create a dashboard in Splunk doesn't give us enough granularity]

    1 vote

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  18. Find all geoJSON points within a large collection of polygons. Reference collection in geoWithin.

    I would like to be able to find all geoJSON points located within a collection of polygons. My personal goal is to find points located within earth's water bodies. The water bodies are located in their own collection while the geoJSON points are located in a separate collection within the same DB. Mongo's geoWithin function only lets me hard code the polygons, but I would like to reference a collection of polygons.

    See https://stackoverflow.com/questions/63162823/mongo-geowithin-error-polygon-coordinates-must-be-an-array

    1 vote

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  19. More verbose information about compact failures in logs

    Recently we had a compact operation fail, and the mongod logs stated this was due to "eviction pressure" on the server. We have learned that this is a failsafe mechanism built into the compact command, but we would like to have a more verbose explanation of this failure mode in the logs to better understand why it failed and steps to remediate the issue.

    1 vote

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  20. MongoDB emulator

    From a user - A MongoDB in-memory emulator would help development against MongoDB in a completely isolated way. They deploy self contained applications for developers that don't have any external connections other than MongoDB. The customer found a community project, fongo, that does this, but it is not supported and trails development by a few versions. https://github.com/fakemongo/fongo. I would be happy to connect the users with relevant project managers

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