nIndex Debug
------------

nIndex support can be enabled in ntopng setting the dump mode to `nindex`
using the [--dump-flows|-F] <mode> option (-F "inindex"). 
The same option can be used to debug issues related to the flows dumped 
in the database. Available parameters: 

-F "nindex;debug" adds extended information to the `JSON` field, this 
includes all the information dumped to the database as columns.
 
-F "nindex;dump" generates a tree of json files containing the same
information dumped to the database. The root folder of this tree is
/var/lib/ntopng/<interface>/flows-json, while the flows database is
created as usual under /var/lib/ntopng/<interface>/flows. 

-F "nindex;load" loads flows information from the json dump (if any) 
placed under /var/lib/ntopng/<interface>/flows-json and feeds the nindex
database. This is useful to reconstruct the flows database using the 
json dump.