![]() We need to follow these steps to copy a database to another database: Finally, the SQL file is processed, and the data will be copied into the new database. Second, it is required to create a new database. In MySQL, making the clone of an original database is a three-step process: First, the original database records are dumped (copied) to a temporary file that holds the SQL commands for reinserting the data into the new database. It is also useful when planning the major changes to the structure of the original database. The most common use of making a duplicate copy of the database is for data backups. Making a duplicate copy of an original database into a new database is very useful when accidentally our database is lost or failure. MySQL copy or clone database is a feature that allows us to create a duplicate copy of an existing database, including the table structure, indexes, constraints, default values, etc. It holds the data into tables, rows, columns, and indexes to quickly find the relevant information. Now the db.sql file is plain text and you can read it and see if everything is as expected.A database is an application used for storing the organized collection of records that can be accessed and manage by the user. sql file using the pg_restore command like so: You can decompress the data and generate a plain text. One issue, as a result, you just can't read it as a normal human being. ![]() The binary format of the output is better because it is more likely to safe all the necessary data than the SQL text format. Get the version and name and concatenate them with a slash in between. The pg_lsclusters will give you a list of your custers, such as: ![]() Pg_restore -cluster 9.3/main -dbanem=db -host=localhost -username=drupal -password db.pgsql To force a cluster run the following two commands: In case you are running multiple clusters, the pg_restore scheme will select the specific pg_restore of the first running cluster (at least in my experience.) The obvious result is: you are likely to get the wrong one. The name at the end of the command line ( db.pgsql) is the filename that you transferred on your new server. By creating the database manually you can also change its name at that time. Note that -dbname is the name of the database in PostgreSQL. Pg_restore -dbname=db -host=localhost -username=drupal -password db.pgsql Now, on your new server, run the restore with something like this:įirst create the database (you can also ask the pg_restore command to do that, but I prefer to do it myself to make sure I don't get errors): user$ psql template1 Then copy the file from your current server to the new server, maybe something like that: So you may be able to simplify the command line to: Also the -host is not required if it is localhost (the default). If you do not have a password in your database, then do not use the -username and -password. Pg_dump -format=c -file=db.pgsql -host=localhost -username=login -password db In any event, in most cases the following commands are enough (I used them with Drupal websites and since they stopped using some of the definitions they have in the system.install file used on initialization, it works as is.) I do not know how to get that to work (and maybe it works in newer version of PostgreSQL?) In most cases that works great, however, some applications may create things such as additional functions that will NOT make it across. When moving a database from one computer to another, you've got to copy all the data.įor that purpose PostgreSQL offers a pair of functions named pg_dump and pg_restore. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |