Support for MongoDB Driver

[lopezio]

Hi Folks,

Is anyone here already working on switching to the new PHP MongoDB Driver ( http://php.net/manual/en/set.mongodb.php )? Particularly the connection pooling of it is very interesting. If no one is working on it, I can give it a take and then hand it over.

Best Wishes!

Lorenzo

[alcaeus]

This library will not be adapted to use the new driver. If you're looking for a replacement of this library, you can check out the MongoDB PHP library: https://github.com/mongodb/mongo-php-library.

We are in the process of adapting Doctrine MongoDB ODM to use the new library (and thus the new driver). You can track progress for this rewrite in doctrine/mongodb-odm#1553.

[jmikola]

Particularly the connection pooling of it is very interesting.

For the record, ext-mongodb does not provide any connection pooling (nor did ext-mongo before it):

For details on supported options, see » Connection String Options in the MongoDB manual. » Connection pool options are not supported, as the PHP driver does not implement connection pools.

That quote is taken from MongoDB\Driver\Manager::__construct(). The connection persistence model implemented by the extension is documented in the Connection Handling article. Please note the difference between connection pooling and persistence.

[lopezio]

For the record, ext-mongodb does not provide any connection pooling (nor did ext-mongo before it):

Gosh, you're right. I must have been blinded by hope. The lack of connection pooling is one of the most annoying performance bottlenecks when using MongoDB with PHP. Using mongos even with mono-shard setups helps a bit (but also reduces redundancy, because the only way to mitigate it is to point to only one mongos), but is very far from being a solution. Let's hope pooling will find it's way to the new PHP extension.

Thanks a lot for pointing it out and redirecting me to the issue.

[jmikola]

Let's hope pooling will find it's way to the new PHP extension.

The very idea of connection pooling conflicts with PHP's architecture for request handling. Note that this is a general problem for all database drivers (see: https://stackoverflow.com/q/39753/162228).