Database

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Add hash function (eg. md5) to aggregation pipeline

I would like to implement hash-based sharding in my own application on top of MongoDB. For that purpose, I would like to pull a stable pseudorandom subset of documents into each of my servers, and I would like to do so without enlarging the docume...

Guest almost 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Improve sorting performance

Sorting always ends up doing a collection scan when the selected index for the find/match does meet the sort requirement. The sort effectively makes the performance worse by 15-25 times for the "matched" dataset which runs into 10s of thousands (n...

Guest almost 3 years ago in Performance & Optimization 0 Submitted

1 VOTE

$currentDate option to only update if the document was modified

A common pattern in a data model is to have a field that denotes when the data was last modified. For this example, let this field be called "updated". I want to toggle a field on a document called "enabled", and if the value is modified I also wa...

Guest almost 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Build MongoDB with PGO

I would like to see support for PGO (and even LLVM Bolt) in the upstream. Would be awesome if MongoDB will distribute PGO-optimized binaries, so the users will be able to see an additional performance boost "for free". At least describe to the use...

Guest almost 3 years ago in Performance & Optimization 1 Submitted

1 VOTE

UTF 16 and UTF 32 support

Currently MongoDB only support UTF 8 strings but it will be great if there is a configuration to change UTF 16 or UTF 32.

Guest almost 3 years ago in Data Modeling & Indexing 0 Submitted

1 VOTE

Need an array query operator like elem match which matches all array nested object instead of at least one array element

as per documentation elem match query matches at least one match in array of nested object, same we need a array query operator which returns the whole document only if elem match like criteria matches all elements in array of nested objects. I h...

Guest almost 3 years ago in Querying & Aggregations 0 Submitted

1 VOTE

Please upgrade third_party/mozjs to esr 102

for new cpu isa (loongarch64/loong64) support , Thanks

Guest almost 3 years ago in Database 0 Submitted

1 VOTE

Support $documents on shards

The new aggregation operator $documents cannot be used together with $merge in a sharded cluster, you get an error: ``` db.aggregate([ { $documents: [ { _id: ObjectId("6616b08a610fab3e84d2d4ee"), a: 'foo', shardKey: 1 }, ] }, { $merge: { in...

Guest almost 3 years ago in Replication & Sharding 0 Submitted

1 VOTE

Raise an error when "majority" writes not possible

This topic is related to https://www.mongodb.com/docs/v6.0/tutorial/mitigate-psa-performance-issues/ in a PSA ReplicaSet configuration. When you try to execute a command with writeConcern `{w: "majority"}` in a three-member Primary-Secondary-Arbi...

Guest about 3 years ago in Replication & Sharding 0 Submitted

1 VOTE

BSON::Proxy Proxy content from/to another collection

I would like a mongodb data type, called BSON::Proxy # not indexable or searchable Which would hold the value of another collection & id. IE: BSON::Proxy({database: "this_one", collection: "blobs", _id: "123"}) This would allow my code to...

Guest about 3 years ago in Data Modeling & Indexing 0 Submitted

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