Mysqldump certain tables Post: 302743073

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Top Forums UNIX for Dummies Questions & Answers Mysqldump certain tables Post 302743073 by timgolding on Wednesday 12th of December 2012 05:40:47 AM

12-12-2012

Registered User

Thanks, i wondered while i was in bed do i really need to create a smaller version of the database on the development server before i upload or would it be better to just dump remotely from the live server. i want the upload to be smooth to reduce any downtime when i do the upload. So i came up with this (ignore the drop database i will change it when i reverse engineer your script)

Code:

# I'll alter this once i understand your script.

mysqladmin -u root --password='mypassword' --socket=/tmp/mysql.sock drop DATABASE_TEMP
mysqladmin -u root --password='mypassword' --socket=/tmp/mysql.sock create DATABASE_TEMP

# Dump a smaller version of the database with compression

mysqldump -u MOVE1 --password='mypassword' -h '107.701.107.701' --opt --compress DATABASE TABLE1 TABLE2 TABLE3 | mysql --socket=/tmp/mysql.sock -u root --password='mypassword' DATABASE_TEMP
echo "temporary database successfully created"

# copy contents of temp database to the live version. Happens quickly and reduces downtime
for table in TABLE1 TABLE2 TABLE3
do
echo "moving data from $table"
mysql --socket=/tmp/mysql.sock -u root --password='mypassword' <<QUERY_INPUT
use DATABASE;
TRUNCATE TABLE $table;
INSERT INTO DATABASE.$table SELECT * FROM DATABASE_TEMP.$table;
QUERY_INPUT
done

If you see i added the tables to the dump like suggested. I will try to remove the dropping database from root now

---------- Post updated at 02:40 AM ---------- Previous update was at 01:33 AM ----------

Ok i get what your script does and have altered my script to drop the tables i want to drop rather than using show tables and dropping them all

Code:

tbl_names='TABLE1 TABLE2 TABLE3 TABLE4 TABLE5'

echo "dropping tables from temp database"
for table in $tbl_names
do
mysql --socket=/tmp/mysql.sock -u LOCAL_DROP --password='mypassword' <<QUERY_INPUT
use DATABASE_TEMP;
DROP TABLE $table;
QUERY_INPUT
done

mysqldump -u MOVE1 --password='mypassword' -h '107.701.107.701' --opt --compress DATABASE $tbl_names | mysql --socket=/tmp/mysql.sock -u root --password='mypassword' DATABASE_TEMP
echo "temporary database successfully created"

# copy contents of temp database to the live version. Happens quickly and reduces downtime
for table in $tbl_names
do
echo "moving data from $table"
mysql --socket=/tmp/mysql.sock -u root --password='mypassword' <<QUERY_INPUT
use DATABASE;
TRUNCATE TABLE $table;
INSERT INTO DATABASE.$table SELECT * FROM DATABASE_TEMP.$table;
QUERY_INPUT
done

Does that seem alright?

Last edited by timgolding; 12-12-2012 at 05:48 AM..

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LEARN ABOUT DEBIAN

mysql::diff::database

MySQL::Diff::Database(3pm)				User Contributed Perl Documentation				MySQL::Diff::Database(3pm)

NAME

       MySQL::Diff::Database - Database Definition Class

SYNOPSIS

	 use MySQL::Diff::Database;

	 my $db = MySQL::Diff::Database->new(%options);
	 my $source    = $db->source_type();
	 my $summary   = $db->summary();
	 my $name      = $db->name();
	 my @tables    = $db->tables();
	 my $table_def = $db->table_by_name($table);

	 my @dbs = MySQL::Diff::Database::available_dbs();

DESCRIPTION

       Parses a database definition into component parts.

METHODS

   Constructor
       new( %options )
	   Instantiate the objects, providing the command line options for database access and process requirements.

   Public Methods
       o   source_type()

	   Returns 'file' if the data source is a text file, and 'db' if connected directly to a database.

       o   summary()

	   Provides a summary of the database.

       o   name()

	   Returns the name of the database.

       o   tables()

	   Returns a list of tables for the current database.

       o   table_by_name( $name )

	   Returns the table definition (see MySQL::Diff::Table) for the given table.

FUNCTIONS

   Public Functions
       o   available_dbs()

	   Returns a list of the available databases.

	   Note that is used as a function call, not a method call.

COPYRIGHT AND LICENSE

       Copyright (c) 2000-2011 Adam Spiers. All rights reserved. This program is free software; you can redistribute it and/or modify it under the
       same terms as Perl itself.

SEE ALSO

       mysqldiff, MySQL::Diff, MySQL::Diff::Table, MySQL::Diff::Utils

AUTHOR

       Adam Spiers <mysqldiff@adamspiers.org>

perl v5.14.2							    2012-04-06						MySQL::Diff::Database(3pm)