Installation
Installation
Installation
Information for installing this PECL extension may
be found in the manual chapter titled Installation of PECL extensions. Additional
information such as new releases, downloads, source files,
maintainer information, and a CHANGELOG, can be located here:
» https://pecl.php.net/package/tokyo_tyrant
Configure options
-
–with-tokyo-tyrant[=DIR] DIR is the
prefix to the Tokyo Tyrant installation -
–with-tokyo-cabinet-dir[=DIR] DIR is
the prefix to the Tokyo Cabinet installation -
–disable-tokyo-tyrant-session Disable
Tokyo Tyrant session handler support
Enabling the extension
The extension can be enabled by adding
extension=tokyo_tyrant.so to the INI-configuration
Running Tokyo Tyrant for the session handler
ttserver -port 2000 -ext /path/to/expire.lua
-extpc expire 30.0 ‘/tmp/sessions.tct#idx=ts:dec’
Note: expire.lua is included in the tokyo_tyrant extension
source distribution
Configuring session handler
- tokyo_tyrant.session_salt=”randomlongstring”
- session.save_handler=tokyo_tyrant
- session.save_path=”tcp://hostname1:2000,tcp://hostname2:2000″
Note: It is
important to make sure that tokyo_tyrant.session_salt matches on all
servers.
How it works?
The session handler creates a session id like the
following:
8b0e27a823fa4a6cf7246945b82c1d51-a5eadbbed1f2075952900628456bfd6830541629-0-5460
The parts from left to right:
- Session id – Generated session id
-
Checksum – Checksum of session salt,
session id, node id and primary key -
Node id – The id of the node where the
session maps to -
Primary key – The primary key of the
row where the session is stored
The checksum contains SHA1 sum of the node id,
primary key, session id and the salt which is known only on the
server side. This allows quick mapping of session id to node and
primary key since there is no need to do an additional search.
During session id regeneration only the parts 1 and 2 change but
the mapping to the node and primary key stays constant.
In case some of the nodes fail tokyo_tyrant.allow_failover, tokyo_tyrant.fail_threshold and tokyo_tyrant.health_check_divisor INI-settings
control the behavior during failover. If failover is allowed the
session handler will map the session to a healthy node and creates
a new empty session.