How to define Atlas Search index without analyzer?

MongoDB Atlas Atlas Search
#1

Hey there,

I’m creating the geo index in one of my collections. In the UI it says it uses default analyzer which is completely useless for my case (geo-queries only).

When switched to simple analyzer the index got a little bit smaller.

Is there a way how to disable it completely to save some resources?

#2

Welcome back @Ikar_Pohorsky.

You can try to use the lucene.keyword analyzer as one option, or you can index only the fields that you need, rather than dynamic:true. Defining a specific subset of fields is the best path for reducing the size of your index.

#3

Thanks @Marcus ,

setting keyword analyzer didn’t help much - the index size was about the same.

my index definition is following:

'mappings': {
    'dynamic': False,
    'fields': {
        'geometry': {
            'type': 'geo'
        }
    }
},

The UI also confirms the dynamic mapping is disabled.

But I’d guess - when your search is based purely on geometry:

'$search': {
    'geoWithin': {
        'path': 'geometry',
        'geometry': geometry,
    },
    'index': INDEX_NAME_AVAILABILITY,
},

…you don’t need any analyzers, do you? The question is how to disable it completely.