mirror of https://github.com/BOINC/boinc.git
56 lines
2.3 KiB
Plaintext
56 lines
2.3 KiB
Plaintext
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Introduction of MySQL in the cluster mode
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This file is mainly depend on the article that is published on the website
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http://dev.mysql.com/tech-resources/articles/mysql-cluster-for-two-servers.html
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I strongly recommended you to read this article three times,
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and my article will give some additional to setup
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on the server when you follow the instruction in the article.
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Problems:
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1, can not start the mysql server when you run the command
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"service mysql.server start"
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first to check the config file of /etc/my.cnf
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if not has this file ,please copy the file
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$FULL_PATH_OF_MYSQL_RELEASE/support-files/my-medium.cnf to /etc/my.cnf
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If you do so ,can not start the mysql then
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please check the file of `hostname`.err this file is usually
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in the directory of /usr/local/mysql/data/ directory
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at the last line ,you probably see these information
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1) can not create $hostname.pid file, if so,
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please check the whole directory access ability of the mysql .
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The method is to use the command
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shell > su mysql
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shell > cd /usr/local/mysql/data
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shell > touch `hostname`.pid
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Mostly you can not access the directory or make the file
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then chmod or chown of the directory
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2) Can not open and lock privilege tables : Table 'mysql.host'
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This is because you do not call the scripts/mysql_install_db
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rightly please run the command
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$FULL_PATH_OF_MYSQL_RELEASE/scripts/mysql_install_db --user=mysql again
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Use of cluster
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If you follow the instruction of the file you will call the
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instruction very well but you will be sure of
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use the engine like this
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ENGINE=NDBCLUSTER
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This will call the database engine of remote backup.
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so you can see the database change on the other node.
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But there is some disconformity on the alter table,
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it is said in the MySQL tutorial in this website
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http://dev.mysql.com/doc/refman/5.0/en/mysql-cluster-limitations.html
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Maybe this is the shortage of MySQL database compensating
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for speed of clusters.
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