What is the best practice for backing up MySQL InnoDB tables? (for myisam I use backuppc)
How can I do a backup and how can I restore it?
Thank you.
mysql> mysqldump -u username -ppassword databasename tablename > Path
to save
you can schedule in in windows scheduler or in cron job after creating the batch file or SH file.
You can use 'mysqldump' program from MySQL to dump individual tables..
shell> mysqldump [options] [tbl_name ...]
To restore the tables use command:
shell>mysql -uusername -ppassword -f -D databasename < /path/to/file/dbbackup.sql
Related
this is probably massively simple, however I will be doing this for a live server and don't want to mess it up.
Can someone please let me know how I can do a mysqldump of all databases, procedures, triggers etc except the mysql and performance_schema databases?
Yes, you can dump several schemas at the same time :
mysqldump --user=[USER] --password=[PASS] --host=[HOST] --databases mydb1 mydb2 mydb3 [...] --routines > dumpfile.sql
OR
mysqldump --user=[USER] --password=[p --host=[HOST] --all-databases --routines > dumpfile.sql
concerning the last command, if you don't want to dump performance_schema (EDIT: as mentioned by #Barranka, by default mysqldump won't dump it), mysql, phpMyAdmin schema, etc. you just need to ensure that [USER] can't access them.
As stated in the reference manual:
mysqldump does not dump the INFORMATION_SCHEMA or performance_schema database by default. To dump either of these, name it explicitly on the command line and also use the --skip-lock-tables option. You can also name them with the --databases option.
So that takes care of your concern about dumping those databases.
Now, to dump all databases, I think you should do something like this:
mysqldump -h Host -u User -pPassword -A -R > very_big_dump.sql
To test it without dumping all data, you can add the -d flag to dump only database, table (and routine) definitions with no data.
As mentioned by Basile in his answer, the easiest way to ommit dumping the mysql database is to invoke mysqldump with a user that does not have access to it. So the punch line is: use or create a user that has access only to the databases you mean to dump.
There's no option in mysqldump that you could use to filter the databases list, but you can run two commands:
# DATABASES=$(mysql -N -B -e "SHOW DATABASES" | grep -Ev '(mysql|performance_schema)')
# mysqldump -B $DATABASES
I know how mysqldump works.
But dont know where to use it?
If I execute this command after starting mysql program then it says error.
I am using ubuntu. So how can I use this utility?
Backup your database this way too..
mysql -u root -p DB_NAME > db_name_backup.sql
If you want to backup all database simply run this
mysql -u root -p > mysql_db_backup.sql
You will learn more about mysql and mysqldump here..
Guide:
mysqldump and mysql
MySQL Database Backup using mysqldump
shell> mysqldump --opt db_name > backup-file.sql
You can read the dump file back into the server like this:
shell> mysql db_name < backup-file.sql
Or like this:
shell> mysql -e "source /path-to-backup/backup-file.sql" db_name
mysqldump is also very useful for populating databases by copying data
from one MySQL server to another:
shell> mysqldump --opt db_name | mysql --host=remote_host -C db_name
It is possible to dump several databases with one command:
shell> mysqldump --databases db_name1 [db_name2 ...] > my_databases.sql
If you want to dump all databases, use the --all-databases option:
shell> mysqldump --all-databases > all_databases.sql
If tables are stored in the InnoDB storage engine, mysqldump provides a
way of making an online backup of these (see command below). This
backup just needs to acquire a global read lock on all tables (using
FLUSH TABLES WITH READ LOCK) at the beginning of the dump. As soon as
this lock has been acquired, the binary log coordinates are read and
lock is released. So if and only if one long updating statement is
running when the FLUSH... is issued, the MySQL server may get stalled
until that long statement finishes, and then the dump becomes
lock-free. So if the MySQL server receives only short (in the sense of
"short execution time") updating statements, even if there are plenty
of them, the initial lock period should not be noticeable.
shell> mysqldump --all-databases --single-transaction > all_databases.sql
For point-in-time recovery (also known as “roll-forward”, when you need
to restore an old backup and replay the changes which happened since
that backup), it is often useful to rotate the binary log (see
Section 8.4, “The Binary Log”) or at least know the binary log
coordinates to which the dump corresponds:
shell> mysqldump --all-databases --master-data=2 > all_databases.sql
or
shell> mysqldump --all-databases --flush-logs --master-data=2 > all_databases.sql
The simultaneous use of --master-data and --single-transaction works as
of MySQL 4.1.8. It provides a convenient way to make an online backup
suitable for point-in-time recovery if tables are stored in the InnoDB
storage engine.
For more information on making backups, see Section 6.1, “Database
Backups”.
mysqldump -u MYSQL_USER -h MYSQL_SERVER -pMYSQL_PASS --all-databases > "dbs.sql"
You use it directly on the terminal, just like mysql it self, and pass the parameters directly to it.
mysqldump -u [user] -p[password] [database name] > dumpfilename.sql
yes you can.
see http://dev.mysql.com/doc/refman/5.0/en/mysqldump.html for more information on the tool.
If it's an entire DB, then:
$ mysqldump -u [uname] -p[pass] db_name > db_backup.sql
If it's all DBs, then:
$ mysqldump -u [uname] -p[pass] --all-databases > all_db_backup.sql
If it's specific tables within a DB, then:
$ mysqldump -u [uname] -p[pass] db_name table1 table2 >
table_backup.sql
You can even go as far as auto-compressing the output using gzip (if your DB is very big):
$ mysqldump -u [uname] -p[pass] db_name | gzip > db_backup.sql.gz
If you want to do this remotely and you have the access to the server in question, then the following would work (presuming the MySQL server is on port 3306):
$ mysqldump -P 3306 -h [ip_address] -u [uname] -p[pass] db_name >
db_backup.sql
To IMPORT:
ype the following command to import sql data file:
$ mysql -u username -p -h localhost DATA-BASE-NAME < data.sql
In this example, import 'data.sql' file into 'blog' database using vivek as username:
$ mysql -u sat -p -h localhost blog < data.sql
If you have a dedicated database server, replace localhost hostname with with actual server name or IP address as follows:
$ mysql -u username -p -h 202.54.1.10 databasename < data.sql
OR use hostname such as mysql.cyberciti.biz
$ mysql -u username -p -h mysql.cyberciti.biz database-name < data.sql
If you do not know the database name or database name is included in sql dump you can try out something as follows:
$ mysql -u username -p -h 202.54.1.10 < data.sql
REfer: http://dev.mysql.com/doc/refman/5.6/en/mysqldump.html
The database "db" is backuped in backup.sql. Is there a way to restore database from script with different from "db" name?
thank you in advance!
Sure, when you import it you do this right:
mysql -uuser -ppassword databasename < mydump.sql
You can put anything you want where I wrote databasename - as long as that database actually exists :)
This depends on how you created your MySQL dB dump file
for example, if you do
mysqldump -h localhost -u user mydb -pXXX > mydb.sql
There won't be any CREATE DATABASE statements in your sql dump file. But I think you can only backup one database.
If you create your mysql dump file with --database or --all-databases option
for example
mysqldump -h localhost -u user --database mydb -pXXX > mydb.sql
mysqldump -h localhost -u user --all-databases -pXXX > alldb.sql
then you will see CREATE DATABASE statement in your mysql dump file. If you want a different dB name, you will need to change it before DB restore.
If the name of the database is include the SQL file, I didn't find any other way than modify the SQL file.
My favorite command to do it :
sed -i "s/\`old_db_name\`/\`new_db_name\`/g" my_sql_file.sql
Open up the .sql file and change the database name inside.
You can use a text editor, like Notepad or gedit.
I want to dump mysql database only the tables which have data, Can u please give me your suggestion. this is more helpful
Thanks & Regards,
Vara Kumar.PJD
You can use the --ignore-table option, but you have to find out which tables are empty first as this is not directly possible with mysqldump. So you could do
mysqldump -u username -p database --ignore-table=database.table1 --ignore-table=database.table2 > database.sql
mysqldump <database options> table1 table2 table3 ...
Use mysqldump (documentation located here). If you do not specify tables it assumes all tables. You can also explicitly choose tables to copy or to ignore. You can tell it to create drop statements before your create statements. If you have mysql 5.1.2 then you can tell it to copy routines.
When you are dumping all database. Obviously it is having large data. So you can prefer below for better:
Creating Backup:
mysqldump -u [user] -p[password]--single-transaction --quick --all-databases | gzip > alldb.sql.gz
If error
-- Warning: Skipping the data of table mysql.event. Specify the --events option explicitly.
Use:
mysqldump -u [user] -p --events --single-transaction --quick --all-databases | gzip > alldb.sql.gz
Restoring Backup:
gunzip < alldb.sql.gz | mysql -u [user] -p[password]
Hope it will help :)
I mysqldump --all-databases nightly as a backup. But on importing this dump into a clean installation, I obviously run into a couple issues.
I obviously can't (and don't want to) overwrite the new information_schema.
All my users and permissions settings are lost, unless I overwrite the mysql database.
What is standard practice in this situation? Parse out information_schema from .sql file before uploading? And do I overwrite the mysql database or not?
you will not have problems with the info schema
http://dev.mysql.com/doc/refman/5.1/en/mysqldump.html
mysqldump does not dump the INFORMATION_SCHEMA database. If you name that database explicitly on the command line, mysqldump silently ignores it.
For excluding database, try this bash script.
for DB in $(echo "show databases" | mysql -u <username> -p'<password>' | grep -v Database grep -v <some_db_to_exclude>)
do
mysqldump -u <username> -p'<password>' ${DB}
done