Is it possible to have a single document in multiple collections, properly referenced? ie. the document is a single instance shared by all collections.

Hello everybody, How can I use secondary servers in shard with replica set when a shard has no primary (during the promoting process) with the php driver to be able to read during the promoting process ? Thanks for your help Arnaud

This drives me crazy. I have one web application running on Nginx + PHP-FPM which connects to MongoDB with official MongoDB PHP driver 1.3.4. Recently, I found that writer operation (including insert and update) cost time in a very un...

Suppose master were down, mongodb failed over, but how apps know the failed over, or which should be the master ? Suppose the connection to mongodb is rset0:21007, now rset0 is down, though a new master can be elected, are all apps do...

I'm using mongodb 2.4.3,trying to convert a statandalone mongdb to a replica set.I initiated primary node and added first secondary node,but the secondary node always failed to synchronize with the primary and crashed some time la...

Mongo 2.4.3 shell (also found this in 2.2.2): {upsert: true}) { "_id" : "i", "thing" : [ ] } {upsert: true}) E11000 duplicate key error index: test.test.$_id_ dup key: { : "i" } It appears that because $exists causes the query to re...

One of the key reasons I use Mongo DB is its fast update capability. I can do an upsert with $inc on an arbitrary hash and it gets created automatically as needed, and atomically incremented. This enables super efficient and easy impl...

Please help me understand why the compiler failed. Thanks. I downloaded by "git clone [link]" and "git checkout release-1.0". $ cat build.sbt name := "mongo-hadoop" organization := "org.mongodb" hadoopRelease in ThisBuild := "cdh4 ...

I've imported MongoDB into my Processing Sketch with the line: import com.mongodb.* I can create objects of type Mongo and DB, but I cannot create a MongoClient object. I receive the error: "Cannot find a class or type named Mong...

Hi i was trying to install mongo driver for php in WAMP, but with not success until now. y download the drivers for mongo php from here: [link] and then i download mongo-1.1.4-php5.3vc6ts (thats was the driver that worked with my w...