createIndex Command takes only one optional Parameter

Hi,

We are trying to create Index with below command

db.traffic_data.createIndex( {process: 1}, {storageEngine:{wiredTiger:

{configString:"block_compressor=zlib"}

}},{background: "True"}) 

It runs as foreground but but picks the storage options

The case is reversed when I use below command, it runs as background but without the storage options

db.traffic_data.createIndex( {process: 1},{background: "True"}, {storageEngine:{wiredTiger:

{configString:"block_compressor=zlib"}

}}) 

 

Thanks,