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    Combine reshardCollection+mongosynd idea to support a remote collection on a separate new cluster

    Great for prod productivity and 99.999 SLA if mongo could support this, for example, Given "mydb.mycoll" in current cluster being sharded with {zip:1} shard key 1/ New cluster: sh.shardCollection( "mydb.mycoll", {name:1, phone:1} ) 2/ "Mongocopy...
    Guest about 3 years ago in Replication & Sharding 0 Submitted

    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...
    Wernfried Domscheit over 3 years ago in Replication & Sharding 0 Submitted

    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...
    Wernfried Domscheit over 3 years ago in Replication & Sharding 0 Submitted

    Make the browser IDE run faster

    The IDE is incredibly slow and unusable.
    Guest over 3 years ago in Education 0 Will Not Implement

    M220p doesn't work

    M220P does not work. Anaconda is also a terrible thing for you to suggest. considering it's python, I would have expected you to just recommend python -m venv .venv -- simple. Yet your entire course doesn't work. python run.py does not work. Multi...
    Guest over 3 years ago in Education 0 Will Not Implement

    URL Decode `readPreferenceTags`

    If a url encoded value is set to readPreferenceTags it will be ignored causing for instance connecting to analytics node impossible from tooling that correctly encodes the urls. It can look like this for instance: `readPreferenceTags=nodeType:ANA...
    Guest about 4 years ago in Replication & Sharding 0 Submitted

    Shard Drain/ Removal issue

    If we have more shards, and if want to remove few shards (more than 1), we use below command. db.adminCommand( { removeShard : "Shardname" } ) Ex, if I have Shard 1, 2, 3, 4, 5. want to remove Shard 2 & 5. I want to remove one shard at a ...
    Guest over 4 years ago in Replication & Sharding 0 Submitted

    Mongo replicaset init sync issue

    When we have large size mongo replica set, we may have to take out each nodes for maintenance for few hrs or days. In that case we have to increase size of Oplog to keep several days of transactions to resync nodes after maintanance. If the RS h...
    Guest over 4 years ago in Replication & Sharding 0 Submitted