We are using Solr with HDFS for our indexing needs. While updating the existing documents(read existing doc and update) in our performance run, we observed that the HDFS storage space was growing exponentially. We are using the standard setting mentioned here: https://cwiki.apache.org/confluence/display/solr/Running+Solr+on+HDFS. Any clues on what could be root cause for our issue? Thanks for your help.