In the documentation for Apache ignite, it states that they provide indexing functionality for RDDS.
Also in the below link we can find methods to create indices. http://apacheignite.gridgain.org/docs/sql-queries
Is there any documentation on what kind of indices it supports underneath (B-trees, R-trees)
Ignite indexes are either based on SnapTreeMap
[1] or on ConcurrentSkipListMap
. The former is used for indexes stored in off-heap memory, while the latter is for on-heap.