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There"s more... generate, create none none with none projectsgenerate barcode c# Apart from being able to run none for none without a user having to log in to the server machine, services can define dependencies; so, for example, you could make sure your application server only gets started when the database is ready. For details on how to do this, refer to Microsoft Knowledge Base article #193888 at http://support.microsoft.

com/kb/193888.. Office Word 7 . As services do not have acces none none s to a console or the graphical user interface in general, any problems encountered while starting the service will not tell you anything about the cause. On Windows, MySQL will report problems to the system event log, viewable from the control panel, and to the MySQL error log file, usually located in the data directory with a name composed from the machine name and a .err extension.

Should your service fail to start, inspect that log file to get an idea of what is wrong. To make sure your configuration file is OK, we recommend you to start the MySQL daemon once from the command line like this:. c:\> c:\mysql\5.1.xx\servi ce\bin\mysqld.

exe --defaults-file=c:\ mysql\5.1.xx\service\my.

ini --console. This will allow you to see any potential problems right away before installing the service. Running multiple MySQL server instances in parallel on a Linux server On most Linux setups, MySQL c none for none omes as a readymade installation package, making it easy to get started. It is, however, a little more complicated to run multiple instances in parallel, often a setup handy for development. This is because in contrast to Windows, MySQL is usually not installed in a self-contained directory, but most Linux distribution packages spread it across the appropriate system folders for programs, configuration files, and so on.

You can, however, also install MySQL in its own directory, for example, if you need to use a version not available as a prepared package for your Linux distribution. While this gives you the greatest flexibility, as a downside you will have to take care of wiring up your MySQL server with the operating system manually. For example, you will need to hook up the startup and shutdown scripts with the appropriate facilities of your distribution.

In more recent distributions, you can make use of a tool called mysqld_multi, a solution that lets you set up multiple instances of MySQL daemons with varying configurations. In this recipe, we will show you how to set up two parallel MySQL servers, listening on different TCP ports and using separate data directories for their respective databases..

Getting ready This recipe is based on an Ub none for none untu Linux machine with the 8.04 LTS version. mysqld_multi comes with the MySQL packages for that operating system.

If you are using other distributions, you need to make sure you have mysqld_multi installed to be able to follow along. Refer to your distribution"s package repositories for information on which packages you need to install..

Configuring MySQL You will al so need an operating system user with sufficient privileges to edit the MySQL configuration file typically /etc/mysql/my.cnf on Ubuntu and restart services. As for AppArmor or SELinux, we assume these have been disabled before you start to simplify the process.

. How to do it... 1. Locate and open the my.cnf configuration file in a text editor.

2. Create the following two sections in the file:. # mysqld_multi test, instance none for none 1 [mysqld1] server-id=10001 socket=/var/run/ mysqld/mysqld1.sock port=23306 pidfile=/var/run/mysqld/mysqld1.pid datadir=/var/lib/mysql1 log_bin=/var/ log/mysql1/mysql1-bin.

log # mysqld_multi test, instance 2 [mysqld2] server-id=10002 socket=/var/run/ mysqld/mysqld2.sock port=33306 pidfile=/var/run/mysqld/mysqld2.pid datadir=/var/lib/mysql2 log_bin=/var/ log/mysql2/mysql2-bin.

log. 3. Save the configuration fil e. 4.

Issue the following command to verify the two sections are found by mysqld_multi:. $ sudo mysqld_multi report 7 . 5. Initialize the data direct none none ories:. $ sudo mysql_install_db --use r=mysql --datadir=/var/lib/mysql1 $ sudo mysql_install_db --user=mysql --datadir=/var/lib/mysql2. 6. Start both instances and v none none erify they have been started:. $ sudo mysqld_multi start 1 $ sudo mysqld_multi report Configuring MySQL 7. Connect none for none to both instances and verify their settings:. $ mysql -S /var/run/mysqld/my sql1.sock mysql> SHOW VARIABLES LIKE "server_id"; $ mysql -S /var/run/mysqld/mysql2.sock mysql> SHOW VARIABLES LIKE "server_id";.

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