solr split the shard data equally in to 2 shard

Question

I have a collection with compositeId router with 5 shards. One of the shard contains around 20 million documents. is there a way to split the shard further into 2 shards having roughly equal documents? (10 million + 10 million documents)?

details of the collection

Answer 1

Have you looked into the shard splitting: https://solr.apache.org/guide/6_6/collections-api.html#CollectionsAPI-splitshard