How to import a very large SQL dump file (6 Gb) to a MySQL database using windows command line. If you are using linux it is the same. The process is the following:
Open a command prompt (or shell in Linux) with administrative privilleges
Connect to a mysql instance using command line
# mysql -h 192.168.1.1 --port=3306 -u root -p
if you are in localhost you do not need host and port
# mysql -u root -p
Or if plesk,
# mysql -uadmin -p`cat /etc/psa/.psa.shadow`
You are now in mysql shell. Set network buffer length to a large byte number. The default value may throw errors for such large data files
mysql> set global net_buffer_length=1000000;
Set maximum allowed packet size to a large byte number.The default value may throw errors for such large data files.
mysql> set global max_allowed_packet=1000000000;
Disable foreign key checking to avoid delays,errors and unwanted behaviour
mysql> SET foreign_key_checks = 0;
mysql> SET UNIQUE_CHECKS = 0;
mysql> SET AUTOCOMMIT = 0;
Import your sql dump file
mysql> use db_name;
mysql> source backup-file.sql;
Remember to enable foreign key checks when procedure is complete!
mysql> SET foreign_key_checks = 1;
mysql> SET UNIQUE_CHECKS = 1;
mysql> SET AUTOCOMMIT = 1;
If you are in Linux you can create a Bash script which will do the dirty job and write to stdout start and end time of import:
#!/bin/sh
# store start date to a variable
imeron=`date`
echo "Import started: OK"
dumpfile="/home/bob/bobiras.sql"
ddl="set names utf8; "
ddl="$ddl set global net_buffer_length=1000000;"
ddl="$ddl set global max_allowed_packet=1000000000; "
ddl="$ddl SET foreign_key_checks = 0; "
ddl="$ddl SET UNIQUE_CHECKS = 0; "
ddl="$ddl SET AUTOCOMMIT = 0; "
# if your dump file does not create a database, select one
ddl="$ddl USE jetdb; "
ddl="$ddl source $dumpfile; "
ddl="$ddl SET foreign_key_checks = 1; "
ddl="$ddl SET UNIQUE_CHECKS = 1; "
ddl="$ddl SET AUTOCOMMIT = 1; "
ddl="$ddl COMMIT ; "
echo "Import started: OK"
time mysql -h 127.0.0.1 -u root -proot -e "$ddl"
# store end date to a variable
imeron2=`date`
echo "Start import:$imeron"
echo "End import:$imeron2"
Other solutions:
Big Dump
http://www.ozerov.de/bigdump/ seems good
Split Files
http://www.rusiczki.net/2007/01/24/sql-dump-file-splitter/
