Compress Network Traffic

Install Dependencies

The following table lists each algorithm and the dependency it requires, if any:

Specify Compression Algorithms

You can enable compression for the connection to your MongoDB instance by specifying the algorithms in one of the following ways:

• Add the compressors parameter to your connection string

• Set the compressors on a mongoc_uri_t struct

Select the Connection String or URI Option tab to view an example that specifies all available compressors:

client = mongoc_client_new("mongodb://<db_username>:<db_password>@<hostname>/?compressors=snappy,zlib,zstd");

uri = mongoc_uri_new("mongodb://localhost:27017");
mongoc_uri_set_compressors(uri, "snappy,zlib,zstd");
client = mongoc_client_new_from_uri(uri);

Zlib Compression Level

When you use the Zlib algorithm, you can specify a compression level from -1 to 9. Lower levels generally provide faster compression with a lower compression ratio, and higher levels provide slower compression with a higher compression ratio.

Select the Connection String or URI Option tab to view an example that specifies a compression level for the zlib compressor:

client = mongoc_client_new("mongodb://<db_username>:<db_password>@<hostname>/?compressors=zlib&zlibCompressionLevel=<zlib_compression_level");

uri = mongoc_uri_new("mongodb://localhost:27017");
mongoc_uri_set_option_as_int32(uri, MONGOC_URI_ZLIBCOMPRESSIONLEVEL, <zlib-compression-level>);
client = mongoc_client_new_from_uri(uri);