Provided by: percona-toolkit_3.0.13-1_all bug


       pt-slave-find - Find and print replication hierarchy tree of MySQL slaves.


       Usage: pt-slave-find [OPTIONS] [DSN]

       pt-slave-find finds and prints a hierarchy tree of MySQL slaves.


          pt-slave-find --host master-host


       Percona Toolkit is mature, proven in the real world, and well tested, but all database
       tools can pose a risk to the system and the database server.  Before using this tool,

       ·   Read the tool's documentation

       ·   Review the tool's known "BUGS"

       ·   Test the tool on a non-production server

       ·   Backup your production server and verify the backups


       pt-slave-find connects to a MySQL replication master and finds its slaves.  Currently the
       only thing it can do is print a tree-like view of the replication hierarchy.

       The master host can be specified using one of two methods.  The first method is to use the
       standard connection-related command line options: "--defaults-file", "--password",
       "--host", "--port", "--socket" or "--user".

       The second method to specify the master host is a DSN.  A DSN is a special syntax that can
       be either just a hostname (like "" or, or a
       "key=value,key=value" string. Keys are a single letter:

          KEY MEANING
          === =======
          h   Connect to host
          P   Port number to use for connection
          S   Socket file to use for connection
          u   User for login if not current user
          p   Password to use when connecting
          F   Only read default options from the given file

       "pt-slave-find" reads all normal MySQL option files, such as ~/.my.cnf, so you may not
       need to specify username, password and other common options at all.


       An exit status of 0 (sometimes also called a return value or return code) indicates
       success.  Any other value represents the exit status of the Perl process itself.


       This tool accepts additional command-line arguments.  Refer to the "SYNOPSIS" and usage
       information for details.

           Prompt for a password when connecting to MySQL.

           short form: -A; type: string

           Default character set.  If the value is utf8, sets Perl's binmode on STDOUT to utf8,
           passes the mysql_enable_utf8 option to DBD::mysql, and runs SET NAMES UTF8 after
           connecting to MySQL.  Any other value sets binmode on STDOUT without the utf8 layer,
           and runs SET NAMES after connecting to MySQL.

           type: Array

           Read this comma-separated list of config files; if specified, this must be the first
           option on the command line.

           type: string; short form: -D

           Database to use.

           short form: -F; type: string

           Only read mysql options from the given file.  You must give an absolute pathname.

           Show help and exit.

           short form: -h; type: string

           Connect to host.

           short form: -p; type: string

           Password to use when connecting.  If password contains commas they must be escaped
           with a backslash: "exam\,ple"

           type: string

           Create the given PID file.  The tool won't start if the PID file already exists and
           the PID it contains is different than the current PID.  However, if the PID file
           exists and the PID it contains is no longer running, the tool will overwrite the PID
           file with the current PID.  The PID file is removed automatically when the tool exits.

           short form: -P; type: int

           Port number to use for connection.

           type: int

           Number of levels to recurse in the hierarchy.  Default is infinite.

           See "--recursion-method".

           type: array; default: processlist,hosts

           Preferred recursion method used to find slaves.

           Possible methods are:

             METHOD       USES
             ===========  ==================
             processlist  SHOW PROCESSLIST
             hosts        SHOW SLAVE HOSTS
             none         Do not find slaves

           The processlist method is preferred because SHOW SLAVE HOSTS is not reliable.
           However, the hosts method is required if the server uses a non-standard port (not
           3306).  Usually pt-slave-find does the right thing and finds the slaves, but you may
           give a preferred method and it will be used first.  If it doesn't find any slaves, the
           other methods will be tried.

           type: string; default: summary

           Set what information about the slaves is printed.  The report format can be one of the

           ·   hostname

               Print just the hostname name of the slaves.  It looks like:


           ·   summary

               Print a summary of each slave's settings.  This report shows more information
               about each slave, like:

                 Version         5.1.34-log
                 Server ID       12345
                 Uptime          04:56 (started 2010-06-17T11:21:22)
                 Replication     Is not a slave, has 1 slaves connected
                 Binary logging  STATEMENT
                 Slave status
                 Slave mode      STRICT
                 Auto-increment  increment 1, offset 1
                    Version         5.1.34-log
                    Server ID       12346
                    Uptime          04:54 (started 2010-06-17T11:21:24)
                    Replication     Is a slave, has 1 slaves connected
                    Binary logging  STATEMENT
                    Slave status    0 seconds behind, running, no errors
                    Slave mode      STRICT
                    Auto-increment  increment 1, offset 1

           Resolve ip-address to hostname. Report will print both IP and hostname.



           Might delay runtime a few seconds.

           type: string

           Sets the user to be used to connect to the slaves.  This parameter allows you to have
           a different user with less privileges on the slaves but that user must exist on all

           type: string

           Sets the password to be used to connect to the slaves.  It can be used with
           --slave-user and the password for the user must be the same on all slaves.

           type: Array

           Set the MySQL variables in this comma-separated list of "variable=value" pairs.

           By default, the tool sets:


           Variables specified on the command line override these defaults.  For example,
           specifying "--set-vars wait_timeout=500" overrides the defaultvalue of 10000.

           The tool prints a warning and continues if a variable cannot be set.

           short form: -S; type: string

           Socket file to use for connection.

           short form: -u; type: string

           User for login if not current user.

           Show version and exit.


       These DSN options are used to create a DSN.  Each option is given like "option=value".
       The options are case-sensitive, so P and p are not the same option.  There cannot be
       whitespace before or after the "=" and if the value contains whitespace it must be quoted.
       DSN options are comma-separated.  See the percona-toolkit manpage for full details.

       ·   A

           dsn: charset; copy: yes

           Default character set.

       ·   D

           dsn: database; copy: yes

           Default database.

       ·   F

           dsn: mysql_read_default_file; copy: yes

           Only read default options from the given file

       ·   h

           dsn: host; copy: yes

           Connect to host.

       ·   p

           dsn: password; copy: yes

           Password to use when connecting.  If password contains commas they must be escaped
           with a backslash: "exam\,ple"

       ·   P

           dsn: port; copy: yes

           Port number to use for connection.

       ·   S

           dsn: mysql_socket; copy: yes

           Socket file to use for connection.

       ·   u

           dsn: user; copy: yes

           User for login if not current user.


       The environment variable "PTDEBUG" enables verbose debugging output to STDERR.  To enable
       debugging and capture all output to a file, run the tool like:

          PTDEBUG=1 pt-slave-find ... > FILE 2>&1

       Be careful: debugging output is voluminous and can generate several megabytes of output.


       You need Perl, DBI, DBD::mysql, and some core packages that ought to be installed in any
       reasonably new version of Perl.


       For a list of known bugs, see <>.

       Please report bugs at <>.  Include the following
       information in your bug report:

       ·   Complete command-line used to run the tool

       ·   Tool "--version"

       ·   MySQL version of all servers involved

       ·   Output from the tool including STDERR

       ·   Input files (log/dump/config files, etc.)

       If possible, include debugging output by running the tool with "PTDEBUG"; see


       Visit <> to download the latest release of
       Percona Toolkit.  Or, get the latest release from the command line:




       You can also get individual tools from the latest release:


       Replace "TOOL" with the name of any tool.


       Baron Schwartz and Daniel Nichter


       This tool is part of Percona Toolkit, a collection of advanced command-line tools for
       MySQL developed by Percona.  Percona Toolkit was forked from two projects in June, 2011:
       Maatkit and Aspersa.  Those projects were created by Baron Schwartz and primarily
       developed by him and Daniel Nichter.  Visit <> to learn
       about other free, open-source software from Percona.


       This program is copyright 2011-2018 Percona LLC and/or its affiliates, 2007-2011 Baron


       This program is free software; you can redistribute it and/or modify it under the terms of
       the GNU General Public License as published by the Free Software Foundation, version 2; OR
       the Perl Artistic License.  On UNIX and similar systems, you can issue `man perlgpl' or
       `man perlartistic' to read these licenses.

       You should have received a copy of the GNU General Public License along with this program;
       if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
       MA  02111-1307  USA.


       pt-slave-find 3.0.13