Thanks Daniel for the help. I was looking at other module parameters. I added this like and tried it again modparam("htable", "htable","xhash=>size=8;dbtable=htable;dbmode=1;") However, it was still not backing up to the database. Seems like there is bug when the expiration is not set or set to 0. I modified the code and it worked. Here is the change log: --- a/modules_k/htable/ht_db.c +++ b/modules_k/htable/ht_db.c @@ -369,10 +369,12 @@ int ht_db_save_table(ht_t *ht, str *dbtable) it->name.len, it->name.s, it->value.n); } - if (it->expire <= now) { + if(ht->htexpire > 0 && ht_db_expires_flag!=0) { + if (it->expire <= now) { LM_DBG("skipping expired entry"); it = it->next; continue; + } } If this is the right fix for the bug, can someone commit this to the main? Thanks Krishna Kura On Wed, Mar 7, 2012 at 9:48 PM, Krishna Kurapati &lt;kkurapat(a)gmail.com <mailto:kkurapat@gmail.com>> wrote: Any help on how to backup the htable content to database table? Thanks On Tue, Mar 6, 2012 at 5:28 PM, Krishna Kurapati &lt;kkurapat(a)gmail.com <mailto:kkurapat@gmail.com>> wrote: I did little more digging into htable source code. It looks like syncing to database is happening when the module is being destroyed. To see if this is working, I tried to stop Kamailio and looked into the database. The htable is still empty. Any configuration changes required to make the process happen? Thanks Krish Kura On Tue, Mar 6, 2012 at 8:38 AM, Krishna Kurapati &lt;kkurapat(a)gmail.com <mailto:kkurapat@gmail.com>> wrote: Hi, This is my first time attempt using htable module. How can I back up the htable content in the database incase the server restarts. I saw a htable in the MySQL database. My observation has been that htable module is not automatically backing up to database even though I added modparams to point to the database. Do I need to explicitly backup htable content to database using sqlops or some other mechanism? Thanks Krish Kura _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users