Difference between revisions of "Mysql Crash Recovery"

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4) <tt> mysqldump zimbra -S /opt/zimbra/db/mysql.sock -u root -p password_for_mysql_root > /tmp/mysql.sql/zimbra.sql </tt>
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4) <tt> mysqldump zimbra -S /opt/zimbra/db/mysql.sock -u root -ppassword_for_mysql_root > /tmp/mysql.sql/zimbra.sql </tt>
  
  

Revision as of 05:28, 30 October 2007

Mysql Crash Recovery


BUG "http://bugzilla.zimbra.com/show_bug.cgi?id=15797"


Mysql Crash recovery is performed when Mysql stops responding and there is error in the /opt/zimbra/db/data/hostname.err [Please check the BUG above for more information]


Steps to perform Recovery:


  • Edit /opt/zimbra/conf/my.cnf: Put an entry :- innodb_force_recovery = 3


  • Dump the database:- mysqldump zimbra and mboxgroup DB's


  • Drop all Database's.


  • Create all Database's.


  • Restore dump data.


1) Edit the my.cnf file and put innodb_force_recovery = 3 : save the file and start mysql. [mysql.server start]


2) mysql -NB -e "show databases" | grep mbox > /tmp/mysql.db.list [Make a list of the existing database]


3) mkdir /tmp/mysql.sql


4) mysqldump zimbra -S /opt/zimbra/db/mysql.sock -u root -ppassword_for_mysql_root > /tmp/mysql.sql/zimbra.sql


[Mysql Root Password you can get this by 'zmlocalconfig -s -m nokey mysql_root_password']


5) Dumping Databases: Run the following command from the prompt:


for db in `< /tmp/mysql.db.list`; \do /opt/zimbra/mysql/bin/mysqldump $db -S /opt/zimbra/db/mysql.sock -u zimbra -ppassword_zimbra_mysql >

/tmp/mysql.sql/$db.sql; \echo -e "Dumped $db\n"; \done;

[Mysql Zimbra Password You can get the password: zmlocalconfig -s -m nokey zimbra_mysql_password]


6) Drop the Database:


for db in `< /tmp/mysql.db.list`; \ do mysql -e "drop database $db"; \echo -e "Dropped $db"; \done;


7) mysql -e "drop database zimbra"


8) Run Mysql in Non-Recovery Mode:


Remove the innodb_force_recovery = 3 from the my.cnf file.


Stop Mysql Server and Start again.


9) Create Database:


mysql -e "create database zimbra character set utf8"


10) Create the existed Database:


for db in `< /tmp/mysql.db.list`; \ do mysql -e "create database $db character set utf8"; \ echo -e "Created $db \n";done;


11) mysql zimbra < /tmp/mysql.sql/zimbra.sql


12) Update Mboxgroup:


for sql in /tmp/mysql.sql/mbox*; \ do mysql `basename $sql .sql` < $sql; \echo -e "Updated `basename $sql .sql` \n"; \done;


13) zmcontrol start


14) Check if everything is up and running.


Verified Against: Zimbra Collaboration Suite 4.5.6 Date Created: 8/13/2007
Article ID: https://wiki.zimbra.com/index.php?title=Mysql_Crash_Recovery Date Modified: 2007-10-30



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