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TTL index activity statistics

Dear all, Presently, there is no visibility or tracking of TTL index activity: no data available to the user to see how much data and how often has been deleted. I suggest having a separate “dictionary” collection with statistics for all TTL inde...

Guest over 1 year ago in Data Modeling & Indexing 0 Submitted

2 VOTE

We need to be able to use $[<identifier>] and "$setOnInsert" in the same command

I want to be able to have a maintain array of counters for a user through a single update statement. If the document containing array of counters does not exist, I want to add it. If it does exist, I want to increment the counter For example, thi...

Guest about 3 years ago in Database 0 Submitted

2 VOTE

hint support for $graphLookup

Currently you can supply a `hint` to the `aggregation` call in order to tell MongoDB to use a specific index for the initial `$match`. But there is currently no way to specify which index to use for a `$graphLookup` later in the pipeline. I would...

Guest about 3 years ago in Querying & Aggregations 0 Submitted

3 VOTE

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,...

Guest almost 5 years ago in Database 1 Submitted

2 VOTE

Add numerically-ordered index feature which forces a field to maintain ordering

I would like MongoDB to add better support for ordered lists across documents in a collection. This feature would allow the user to designate a field such as "position", and the DB would ensure the values of that field across documents remain in a...

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

1 VOTE

Sorting support on Array fields.

Presently, I'm attempting to arrange(sort) the documents within my collection based on a key nested within an array object. However, sorting isn't functioning as expected in this scenario. A proper explanation with example is here what I mean. ht...

Guest over 1 year ago in Querying & Aggregations 0 Submitted

3 VOTE

Option to prohibit a non-voting member from becoming a sync source of a voting member

Hi, Our proposition in a few words: add a replica set option to allow chained replication but with the following exception: a non-voting member cannot become a sync source of a voting member under any circumstance. This proposition would allow c...

Guest almost 5 years ago in Database 0 Submitted

1 VOTE

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Guest over 1 year ago in Replication & Sharding 0 Submitted

2 VOTE

Use dedicated interface for replication and balancing

Like many other big database system, MongoDB may support to specify dedicated interfaces for replication and/or for the balancer (sharding) Currently you can configure replication sets and shards members only by single hostname/IP-Address, i.e. *...

Guest over 3 years ago in Replication & Sharding 0 Submitted

2 VOTE

Make it clear an index not on present on all shards

We recently had an issue where an index did not get created on all shards. When we ran getIndexes() on mongos it reported the index was present. So we dropped another redundant index thinking all would be well - it was not. We had serious performa...

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

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