Installation
Resource Types
Installing/Configuring
PHP Manual

## Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

tokyo_tyrant Configure Options
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.