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MySQL/MariaDB replication

December 24, 2020 by Igor Drobot Leave a Comment

mysql-replication

MySQL-Replication could be a kind of load balancing for querieng applications or active failover/backup node which has the same data.

Also for common heavy loaded scenarios, where the primary write-queries are going to the master node and all read-queries are running against the slave node.

[Read more…]

Filed Under: Linux, MySQL Tagged With: Debian, MySQL, MySQL replication, MySQL slave

MySQL Dump

October 11, 2011 by Igor Drobot Leave a Comment


Collection of some MySQL commands, very useful to create and restore MySQL-Backups.
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Filed Under: Debian, Linux, MySQL Tagged With: MySQL, MySQL Backup, MYSQL Dump, mysqldump, mysqldumper

MySQL: Error 1016 when using LOCK TABLES

August 8, 2011 by Igor Drobot 2 Comments

I run a nightly mysqldump of all my databases and one of them has over 500 tables, mysqldumper bring me a error while processing this huge database: [Read more…]

Filed Under: Linux, MySQL Tagged With: MySQL, mysqldump, single-transaction, skip-lock-tables

Access denied for user ‘debian-sys-maint’

March 29, 2011 by Igor Drobot Leave a Comment


While trying to start or stop MySQL I get:

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Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)

Access denied for user 'debian-sys-maint'@'localhost' (using password: YES)

Dabian has a own way to login to the MySQL database the credantials are listed in a file:

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cat /etc/mysql/debian.cnf
[...]
user = debian-sys-maint
password = bodCNLUx0GGYm6F

cat /etc/mysql/debian.cnf [...] user = debian-sys-maint password = bodCNLUx0GGYm6F

Logon:

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mysql -u root -p

mysql -u root -p

Execute:

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GRANT ALL PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY 'bodCNLUx0GGYm6F' WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY 'bodCNLUx0GGYm6F' WITH GRANT OPTION;

By the way set a new root passwort:

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mysqladmin -u root password 'new-password'

mysqladmin -u root password 'new-password'

Filed Under: Debian, Linux, MySQL Tagged With: Access denied, debian-sys-maint, MySQL

MySQL Error Codes

February 5, 2011 by Igor Drobot 1 Comment

Sometimes you need a good reference, and this is one of those times. MySQL’s perror command returns many error codes, and I’ve provided a listing here. To find errors individually, just run:

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# perror 28
OS error code  28:  No space left on device

# perror 28 OS error code 28: No space left on device

[Read more…]

Filed Under: Linux, MySQL Tagged With: MySQL

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