Tokyo Tyrant (Ttserver) Series: Startup parameters and Configuration

Introduction to Startup Parameters

Continue with the Tokyo Tyrant (ttserver) Series-Introduction and installation, we continue to look at the startup parameters and configuration.

The Ttserver command can start a database instance. Because the database has implemented the abstract API for Tokyo cabinet, you can specify the configuration type of the database at startup.

The supported database types are:

Memory Hash Database

Memory Tree Database

Hash database

B + Tree Database,

The command is used in the following format, ' dbname ' makes the database name and, if omitted, is considered a memory hash database.

Ttserver [-host name] [-port num] [-thnum num] [-tout num] [-DMN] [-pid path] [-log path] [-ld|-le] [-ulog path] [-ulim n UM] [-UAS] [-sidnum] [-mhost name] [-mport num] [-rts path] [-ext path] [-extpc name period] [-mask expr] [dbname]

The following are the functions of these parameters:

-host　name

: Indicates the hostname or IP address of the server. All addresses of the default server are bound. For example: Specifies the IP such as 127.0.0.1, only can be accessed locally.

-port　num

: Specifies the port on which the service starts. Default 1978. If you want to start multiple database instances, the port needs to be different.

-thnum　num

: Specifies the number of threads that the service works on. Default 8.

-tout　num

: Specifies the time-out period for each session. The default never times out.

-dmn

: Run as a daemon.

-pid　path

: Outputs the process IP to the specified file.

-log　path

: Output log information to the specified file.

-ld

: Debug information is logged in the log.

-le

: only error messages are logged in the log.

-ulog　path

: Specifies the directory where the update log is stored. Can be used to back up the recovery database, synchronization between the master and the library.

-ulim　num

: Specifies the size limit for each update log file.

-uas

: Update logs with asynchronous IO records. (Use this to reduce the IO overhead of writing to the log, but data may be lost when the server shuts down unexpectedly and the process is killed.) According to experience, generally can not use).

-sid　num

: Specifies the ID number of the service. Master-slave replication is identified by different ID numbers.

-mhost　name

: Specifies the IP or domain name of the primary server in master-slave replication mode.

-mport　num

: Specifies the port number of the primary server in master-slave mode.

-rts　path

: Specifies a timestamp file for master-slave replication.

-ext　path

: Specifies the extended scripting language file.

-extpc　name　period

: Specifies the name of the function and the time interval that is called by the cycle.

-mask　expr

: Specifies the prohibited command name (for example, you can disable the use of empty vanish).

-unmask　expr

: Specifies the allowed command name.