percona/percona-toolkit
1
0
Fork 0
mirror of https://github.com/percona/percona-toolkit.git synced 2025-09-11 13:40:07 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
3d3973674ef628d23c232cd78ddbb1fa21a5743f
percona-toolkit/docs/user/pt-slave-find.rst
Daniel Nichter 43aebffad1 Build percona-toolkit-1.0.1
2011-09-01 10:00:38 -06:00

544 lines
11 KiB
ReStructuredText
Raw Blame History

#############
pt-slave-find
#############
.. highlight:: perl
****
NAME
****
pt-slave-find - Find and print replication hierarchy tree of MySQL slaves.
********
SYNOPSIS
********
Usage: pt-slave-find [OPTION...] MASTER-HOST
pt-slave-find finds and prints a hierarchy tree of MySQL slaves.
Examples:
.. code-block:: perl
pt-slave-find --host master-host
*****
RISKS
*****
The following section is included to inform users about the potential risks,
whether known or unknown, of using this tool. The two main categories of risks
are those created by the nature of the tool (e.g. read-only tools vs. read-write
tools) and those created by bugs.
pt-slave-find is read-only and very low-risk.
At the time of this release, we know of no bugs that could cause serious harm to
users.
The authoritative source for updated information is always the online issue
tracking system. Issues that affect this tool will be marked as such. You can
see a list of such issues at the following URL:
`http://www.percona.com/bugs/pt-slave-find <http://www.percona.com/bugs/pt-slave-find>`_.
See also "BUGS" for more information on filing bugs and getting help.
***********
DESCRIPTION
***********
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 \ ``server.domain.com``\ or
\ ``1.2.3.4``\ ), or a \ ``key=value,key=value``\ string. Keys are a single letter:
.. code-block:: perl
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.
***********
EXIT STATUS
***********
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.
*******
OPTIONS
*******
This tool accepts additional command-line arguments. Refer to the
"SYNOPSIS" and usage information for details.
--ask-pass
Prompt for a password when connecting to MySQL.
--charset
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.
--config
type: Array
Read this comma-separated list of config files; if specified, this must be the
first option on the command line.
--database
type: string; short form: -D
Database to use.
--defaults-file
short form: -F; type: string
Only read mysql options from the given file. You must give an absolute
pathname.
--help
Show help and exit.
--host
short form: -h; type: string
Connect to host.
--password
short form: -p; type: string
Password to use when connecting.
--pid
type: string
Create the given PID file. The file contains the process ID of the script.
The PID file is removed when the script exits. Before starting, the script
checks if the PID file already exists. If it does not, then the script creates
and writes its own PID to it. If it does, then the script checks the following:
if the file contains a PID and a process is running with that PID, then
the script dies; or, if there is no process running with that PID, then the
script overwrites the file with its own PID and starts; else, if the file
contains no PID, then the script dies.
--port
short form: -P; type: int
Port number to use for connection.
--recurse
type: int
Number of levels to recurse in the hierarchy. Default is infinite.
See "--recursion-method".
--recursion-method
type: string
Preferred recursion method used to find slaves.
Possible methods are:
.. code-block:: perl
METHOD USES
=========== ================
processlist SHOW PROCESSLIST
hosts SHOW SLAVE HOSTS
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.
--report-format
type: string; default: summary
Set what information about the slaves is printed. The report format can be
one of the following:
\* hostname
Print just the hostname name of the slaves. It looks like:
.. code-block:: perl
127.0.0.1:12345
+- 127.0.0.1:12346
+- 127.0.0.1:12347
\* summary
Print a summary of each slave's settings. This report shows more information
about each slave, like:
.. code-block:: perl
127.0.0.1:12345
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
Filters
Binary logging STATEMENT
Slave status
Slave mode STRICT
Auto-increment increment 1, offset 1
+- 127.0.0.1:12346
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
Filters
Binary logging STATEMENT
Slave status 0 seconds behind, running, no errors
Slave mode STRICT
Auto-increment increment 1, offset 1
--set-vars
type: string; default: wait_timeout=10000
Set these MySQL variables. Immediately after connecting to MySQL, this
string will be appended to SET and executed.
--socket
short form: -S; type: string
Socket file to use for connection.
--user
short form: -u; type: string
User for login if not current user.
--version
Show version and exit.
***********
DSN OPTIONS
***********
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.
\* 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.
***********
ENVIRONMENT
***********
The environment variable \ ``PTDEBUG``\ enables verbose debugging output to STDERR.
To enable debugging and capture all output to a file, run the tool like:
.. code-block:: perl
PTDEBUG=1 pt-slave-find ... > FILE 2>&1
Be careful: debugging output is voluminous and can generate several megabytes
of output.
*******************
SYSTEM REQUIREMENTS
*******************
You need Perl, DBI, DBD::mysql, and some core packages that ought to be
installed in any reasonably new version of Perl.
****
BUGS
****
For a list of known bugs, see `http://www.percona.com/bugs/pt-slave-find <http://www.percona.com/bugs/pt-slave-find>`_.
Please report bugs at `https://bugs.launchpad.net/percona-toolkit <https://bugs.launchpad.net/percona-toolkit>`_.
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 "ENVIRONMENT".
***********
DOWNLOADING
***********
Visit `http://www.percona.com/software/percona-toolkit/ <http://www.percona.com/software/percona-toolkit/>`_ to download the
latest release of Percona Toolkit. Or, get the latest release from the
command line:
.. code-block:: perl
wget percona.com/get/percona-toolkit.tar.gz
wget percona.com/get/percona-toolkit.rpm
wget percona.com/get/percona-toolkit.deb
You can also get individual tools from the latest release:
.. code-block:: perl
wget percona.com/get/TOOL
Replace \ ``TOOL``\ with the name of any tool.
*******
AUTHORS
*******
Baron Schwartz and Daniel Nichter
*********************
ABOUT PERCONA TOOLKIT
*********************
This tool is part of Percona Toolkit, a collection of advanced command-line
tools developed by Percona for MySQL support and consulting. Percona Toolkit
was forked from two projects in June, 2011: Maatkit and Aspersa. Those
projects were created by Baron Schwartz and developed primarily by him and
Daniel Nichter, both of whom are employed by Percona. Visit
`http://www.percona.com/software/ <http://www.percona.com/software/>`_ for more software developed by Percona.
********************************
COPYRIGHT, LICENSE, AND WARRANTY
********************************
This program is copyright 2007-2011 Baron Schwartz, 2011 Percona Inc.
Feedback and improvements are welcome.
THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.
*******
VERSION
*******
pt-slave-find 1.0.1
Reference in New Issue View Git Blame Copy Permalink