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Copy database or table from one MySQL server to another, clever way.

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This simple bash script can copy database or a table from one remote server to another. Can be used as a backup, but also as a one way sync on a database or table.

ssh -fNg… <- creates a permanent tunnel to the remote server on port 3307. So now from the local server you can access both local and remote MySQL.

export MYSQL_PWD=… <- Helps hide password, as long as you make this script secure, the password it not accessible.

Last one-liner does the rest, if you remove <DB_TABLE_NAME> it will send the entire DB over to the remote, so be carefuller. But you already new that and have a backup, right?

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Posted in Linux, MySQL Leave a comment

(Errcode: 24 – Too many open files) [23] – Plesk Onyx 17.5.3 and Ubuntu 16.04.2 LTS‬

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As of MySQL 5.7.7, this is what the documentation recommends for Red Hat Enterprise Linux 7, Oracle Linux 7, CentOS 7, SUSE Linux Enterprise Server 12, Fedora 24 and 25:

On Ubuntu 16.04 the service is called mysql, not mysqld, so this is what I did:

sudo mkdir /etc/systemd/system/mysql.service.d
sudo vi /etc/systemd/system/mysql.service.d/override.conf
Added this in the new file override.conf:

LimitNOFILE=1024 4096

Then restarted the service:

sudo systemctl daemon-reload
sudo systemctl restart mysql

and test it with

cat /proc/$(pgrep mysql)/limits | grep files

Posted in Linux, PLESK 2 Comments
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