more tq

ThreatQ Notes.md

@@ -127,6 +127,9 @@ cd /var/www/api
 php artisan threatq:backup --exclude-solr
 ```
 
+The backup of solr goes to /tmp first so you'll need sufficient space there.  If the backup
+seems to be hanging / taking forever, it might be because of insufficient space.
+
 ## Reindexing
 
 TQ uses Solr like elasticsearch.  Most of your UI interactions use Solr, but the