UDR is disabled by default - to enable it, set ``unique-response-tracking=yes`` in recursor.conf.
-The data is persisted to /var/log/pdns-recursor/udr by default, which can be changed with the setting ``unique-response-history-dir=<new directory>``.
+The data is persisted to /var/lib/pdns-recursor/udr by default, which can be changed with the setting ``unique-response-history-dir=<new directory>``.
The SBF (which is maintained separately per recursor thread) cell size defaults to 67108864, which can be changed using the setting ``unique-response-db-size``. The same caveats regarding FPs/FNs apply as for NOD.