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=Documentation=
 +
*[http://dev.mysql.com/doc/ MySQL official documentation page]
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**[http://dev.mysql.com/doc/refman/5.1/en/index.html MySQL 5.1 Reference Manual]
 +
 
=Tools=
 
=Tools=
 
*PHPMyAdmin
 
*PHPMyAdmin
 +
*mytop
 +
*mtop
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*[http://www.xaprb.com/innotop innotop]
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**[http://www.xaprb.com/blog/2006/07/02/innotop-mysql-innodb-monitor/ innotop Article]
 +
 +
=Performance=
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*[http://www.mysqlperformanceblog.com MySQL Performance Blog]
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**[http://www.mysqlperformanceblog.com/2006/09/29/what-to-tune-in-mysql-server-after-installation/ What to tune in MySQL Server after installation]
 +
 +
=Syntax=
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==Select==
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CONCAT(first_name, ' ', last_name)
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 +
=Integration=
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Authentication using LDAP, kerberos, etc is not ready yet
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*[http://forge.mysql.com/wiki/PluggableAuthenticationSupport This page describes the MySQL plan for Pluggable Authentication Support, which is currently under consideration - PluggableAuthenticationSupport]
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 +
=Common task=
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==Change password==
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set password = password("yournewpassword");
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 +
=Database Backups=
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==Hot backup - One database==
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<pre>
 +
#!/bin/sh
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# by gacq
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#
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USERNAME=$1
 +
PASSWORD=$2
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DATABASE=$3
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OUTPUTDIR="/srv/backup/mysql"
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 +
# Delete backups older than the number of days specified in DAYS
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DAYS=8
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date=`date +%F_%T | tr \: _`
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mysqldump --user=$USERNAME --password=$PASSWORD $DATABASE | gzip > $OUTPUTDIR/dbbackup_$DATABASE-${date}.sql.gz
 +
 +
# Delete older backups
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find $OUTPUTDIR -type f -name "dbbackup_$DATABASE*" -ctime $DAYS -exec rm -f {} \;
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</pre>
 +
 +
==Hot backup - All databases==
 +
#!/bin/sh
 +
# by gacq
 +
#
 +
# MySQL root password
 +
PASSWORD=$1
 +
OUTPUTDIR="/srv/backup/mysql"
 +
 +
# Delete backups older than the number of days specified in DAYS
 +
DAYS=8
 +
 +
date=`date +%F_%T | tr \: _`
 +
mysqldump --all-databases --password=$PASSWORD | gzip > $OUTPUTDIR/all-databases-${date}.sql.gz
 +
 +
# Delete older backups
 +
find $OUTPUTDIR -type f -name "all-databases.*.sql" -ctime $DAYS -exec rm -f {} \;
 +
 +
==Hot backup - All databases, each database in a separated file==
 +
#!/bin/sh
 +
# by gacq
 +
#
 +
# MySQL root password
 +
PASSWORD=$1
 +
BASEDIR="/srv/backup/mysql"
 +
 +
# Delete backups older than the number of days specified in DAYS
 +
DAYS=8
 +
 +
date=`date +%F_%T | tr \: _`
 +
 +
OUTPUTDIR="$BASEDIR/mySQLbackup_$date"
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mkdir -p $OUTPUTDIR
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databases=`echo "show databases;" | mysql -Bs -uroot -p$PASSWORD`
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for db in `echo $databases`
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do
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  mysqldump --databases --password=$PASSWORD $db | gzip > $OUTPUTDIR/mySQLdump-$db-${date}.sql.gz
 +
done
 +
 +
# Delete older backups
 +
find $BASEDIR -type d -name "mySQLbackup*" -ctime $DAYS -exec rm -fr {} \;
 +
 +
==Selected databases==
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databases="db1 db2 db3"
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for db in `echo $databases`
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do
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  mysqldump --databases  -uroot -p$passwd $db | gzip > $dir/mySQL/mySQLdump-$db.dump.gz
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done
 +
 +
==Backup using LVM snapshots==
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*[http://mike.kruckenberg.com/archives/2006/04/limits_in_mysql.html Limits in mysqldump?]
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*[http://mike.kruckenberg.com/archives/2006/05/mysql_backups_u.html MySQL Backups using LVM Snapshots]
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*[http://www.mysqlperformanceblog.com/2006/08/21/using-lvm-for-mysql-backup-and-replication-setup/ Using LVM for MySQL Backup and Replication Setup]
 +
 +
= Errors =
 +
== Error 1044 on mysqldump ==
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<pre>
 +
mysqldump: Got error: 1044: Access denied for user 'root'@'localhost' to database 'information_schema' when using LOCK TABLES
 +
</pre>
 +
 +
Resolved using the '--single-transaction' option of mysqldump
 +
 +
* http://forums.mysql.com/read.php?10,108835,112951#msg-112951

Revisión actual del 09:05 21 oct 2010

Documentation

Tools

Performance

Syntax

Select

CONCAT(first_name, ' ', last_name)

Integration

Authentication using LDAP, kerberos, etc is not ready yet

Common task

Change password

set password = password("yournewpassword");

Database Backups

Hot backup - One database

#!/bin/sh
# by gacq
#
USERNAME=$1
PASSWORD=$2
DATABASE=$3
OUTPUTDIR="/srv/backup/mysql"

# Delete backups older than the number of days specified in DAYS
DAYS=8

date=`date +%F_%T | tr \: _`
mysqldump --user=$USERNAME --password=$PASSWORD $DATABASE | gzip > $OUTPUTDIR/dbbackup_$DATABASE-${date}.sql.gz

# Delete older backups
find $OUTPUTDIR -type f -name "dbbackup_$DATABASE*" -ctime $DAYS -exec rm -f {} \;

Hot backup - All databases

#!/bin/sh
# by gacq
#
# MySQL root password
PASSWORD=$1
OUTPUTDIR="/srv/backup/mysql"

# Delete backups older than the number of days specified in DAYS
DAYS=8

date=`date +%F_%T | tr \: _`
mysqldump --all-databases --password=$PASSWORD | gzip > $OUTPUTDIR/all-databases-${date}.sql.gz

# Delete older backups
find $OUTPUTDIR -type f -name "all-databases.*.sql" -ctime $DAYS -exec rm -f {} \;

Hot backup - All databases, each database in a separated file

#!/bin/sh
# by gacq
#
# MySQL root password
PASSWORD=$1
BASEDIR="/srv/backup/mysql"

# Delete backups older than the number of days specified in DAYS
DAYS=8

date=`date +%F_%T | tr \: _`

OUTPUTDIR="$BASEDIR/mySQLbackup_$date"
mkdir -p $OUTPUTDIR

databases=`echo "show databases;" | mysql -Bs -uroot -p$PASSWORD`
for db in `echo $databases`
do
  mysqldump --databases --password=$PASSWORD $db | gzip > $OUTPUTDIR/mySQLdump-$db-${date}.sql.gz
done

# Delete older backups
find $BASEDIR -type d -name "mySQLbackup*" -ctime $DAYS -exec rm -fr {} \;

Selected databases

databases="db1 db2 db3"
for db in `echo $databases`
do
  mysqldump --databases  -uroot -p$passwd $db | gzip > $dir/mySQL/mySQLdump-$db.dump.gz
done

Backup using LVM snapshots

Errors

Error 1044 on mysqldump

mysqldump: Got error: 1044: Access denied for user 'root'@'localhost' to database 'information_schema' when using LOCK TABLES

Resolved using the '--single-transaction' option of mysqldump 

* http://forums.mysql.com/read.php?10,108835,112951#msg-112951
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