Very Useful Mod .. but please note noderead table saves markread data for last 10 days only ( by Default ) and it is cleaned by cron job 'Hourly Cleanup'
PHP Code:
vB::getDbAssertor()->delete('noderead',
array(
array('field'=>'readtime', 'value' => $timenow - (vB::getDatastore()->getOption('markinglimit') * 86400), vB_dB_Query::OPERATOR_KEY => vB_dB_Query::OPERATOR_LT)
)
);
WHERE
PHP Code:
vB::getDatastore()->getOption('markinglimit') = 10 by Default
I Suggest Creating your own table