I have created indexes using splunk web. can anyone tell where these custom indexes are getting stored on indexer server?
The index data files are stored under your SPLUNK_DIR/var/lib/splunk
Index configuration files are stored based on the app context. If you were creating it from Search app, then it should be in etc/apps/search/local/indexes.conf
Another easiest way to find all information is running the btool
splunk cmd btool indexes list --debug
Did this work for you?