The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable | Changelog | 
|---|---|---|---|
| tokyo_tyrant.default_timeout | 2.0 | PHP_INI_ALL | |
| tokyo_tyrant.session_salt | NULL | PHP_INI_ALL | |
| tokyo_tyrant.key_prefix | NULL | PHP_INI_ALL | |
| tokyo_tyrant.allow_failover | 1 | PHP_INI_ALL | |
| tokyo_tyrant.fail_threshold | 5 | PHP_INI_ALL | |
| tokyo_tyrant.health_check_divisor | 1000 | PHP_INI_ALL | |
| tokyo_tyrant.php_expiration | 0 | PHP_INI_ALL | 
Here's a short explanation of the configuration directives.
tokyo_tyrant.default_timeout
      integer
     Default timeout when connecting to databases
tokyo_tyrant.session_salt
      string
     The secret that is used to salt session id
tokyo_tyrant.key_prefix
      string
     Prefix all keys with this string. The prefix is transparent to the developer but helps making sure that keys won't collide if multiple applications are using the same database.
tokyo_tyrant.allow_failover
      integer
     Whether to allow session failover in case a server dies.
tokyo_tyrant.fail_threshold
      integer
     How many read/write or connection failures is allowed before server is marked as failed.
tokyo_tyrant.health_check_divisor
      integer
     Defines the divisor for the health check probability. If there are failed servers and the probability matches, the servers are health checked and in case the server seems healthy, it will be added back to the pool.
tokyo_tyrant.php_expiration
      integer
     Whether to use built in session expiration mechanism or delegate the expiration to a lua-script on the server-side.