Server clustering?

Hello,

and, first of all, let me thank you for such an interesting plugin.

We’re considering to use for a map-based project, but we’ve come to several technical questions.

1. We’ll be having relatively many markers on our map – hundreds of them constantly (max. ~3000 expected). That would, no doubt, require marker clusterization.

If Leaflet uses client-side clustering, it won’t be enough. So, is server clusterization supported?

2. How do markers queried before passing them to the map? Is it current viewport-based query, or all of the markers selected without considering their coordinates?

3. Is clustering available only for Pro-version?

Thank you in advance.

http://wordpress.org/extend/plugins/leaflet-maps-marker/