I do plan to migrate the database from version 5.1 to version 5.6.
I want to do this by using mysqldump:
Export (by mysqldump) data from MySQL DB 5.1 to sql file,
Import (by mysqldump) this sql file that MySQL 5.6 database,
Do not have a complex database that migration can be associated with some risks?
What to look for?
I can not do update database from 5.1 a 5.6, because I can not stop the production base at this point.
Generally speaking it is safe (and supported) to upgrade using mysqldump.
My best suggestion is to use mysqldump from MyQSL 5.6 against the 5.1 server, as newer versions have quite a few fixes to ensure the correct order when dumping foreign keys and other bits and pieces. Your 5.1 version may have these fixes already, but using the newer version won't hurt in any case.
Ensure you run mysql_upgrade after importing the database into 5.6, and then restart the server, as per the MySQL upgrade guide:
http://dev.mysql.com/doc/refman/5.6/en/upgrading.html
Alternatively if you can update in two steps, you can do a in-place binary upgrade by first upgrading to 5.5.x before 5.6.x, ensuring to run mysql_upgrade during both steps.
Related
i have Azure Database for MySQL of version 5.6 in AZURE and i read somewhere that MYSQL support in slave in higher version (5.7) than the master (5.6) but i did not found any reference to it in AZURE doc and did not found any option to configure version when creating replica via AZURE portal , is this possible to configure replica in higher version specifically salve of MYSQL version 5.7 to MYSQL 5.6 master in Azure Database for MySQL ?
Azure Database for MySQL support version 5.6 and 5.7.
You can get all the supported versions and release notes from this document:
Supported Azure Database for MySQL server versions:
MySQL Version 5.6: Refer to the MySQL release notes to learn
more about improvements and fixes in this version.
MySQL Version 5.7: Refer to the MySQL release notes to learn
more about improvements and fixes in this version.
In Azure Database for MySQL,Using dump and restore help you upgrade across MySQL versions. For more details, please see: Common uses for dump and restore
To avoid any compatibility issues, ensure the same version of MySQL is used on the source and destination systems when dumping databases. For example, if your existing MySQL server is version 5.7, then you should migrate to Azure Database for MySQL configured to run version 5.7.
If you don't need to care about the compatibility issues, you can try to use this way to
downgrade and configure the version 5.7 to 5.6.
Hope this helps.
I need to convert a mysql database to postgres. Just for testing, I installed a local mysql database and created a simple test database with one table. Now I wan't to make a SQL dump with the option --compatible=postgresql:
mysqldump test --compatible=postgresql -uroot > ~/Documents/testdump.sql
But I always get the following error message:
Invalid mode to --compatible: postgresql
I'm using OSX and installed mysql using homebrew
the mysql version is: stable 8.0.12 (bottled)
I also tried it with the Docker-container and the newest version 8.0.12 but it also gives me the same error message. I need the compatible mode so I can use the dump with an python script to convert it to postgresql.
Edit:
I downgraded to 5.7 and it's now working - I'm still wondering why it's not working with the new version.
If you check the documentation for MySQL 8, you will find this:
--compatible=name
Produce output that is more compatible with other database systems or
with older MySQL servers. The only permitted value for this option
is ansi, which has the same meaning as the corresponding option for
setting the server SQL mode.
So setting the value of name to postgresql won't work.
https://dev.mysql.com/doc/refman/8.0/en/mysqldump.html#option_mysqldump_compatible
For 5.7 the following values are possible, which is the reason that a downgrade enabled you to use the desired value:
--compatible=name
Produce output that is more compatible with other database systems or
with older MySQL servers. The value of name can be ansi, mysql323,
mysql40, postgresql, oracle, mssql, db2, maxdb, no_key_options,
no_table_options, or no_field_options.
we know the supported logical upgrade method is:
5.1-5.5,
5.5-5.6,
5.6-5.7.
In each step, we mysqldump, then we need 3times.
If I mysqldump from 5.1, then install mysql5.7, we need 1 time mysqldump.
Can mysql 5.7 recognize mysqldump file from 5.1?
You should look at the differences that MySQL 5.7 offer compared to the older versions and see if it affects anything but considering how large of a jump it is, I find it hard it would "just work." In short, most likely not. Your best bet is to take your data in MySQL 5.1, upgrade it to 5.7 so your schema inherits all the changes that may have happened, and then make a new mysqldump of that.
Related sources:
https://dba.stackexchange.com/questions/123154/migrating-upgrading-a-mysql-5-1-schema-to-mysql-5-7-schema
Upgrading directly from MySQL 5.0 to 5.7
I need to downgrade data from MySQL 5.7 to MySQL 5.1. are there any ways to do in simple steps? (backup and restore )T
There is a solution is step by step like downgrade from 5.7 to 5.6, and then to 5.5.
The Following link says step by step
Make sure you're not using features from 5.7, that are not avaliable in 5.1, for example utf8mb4 encoding (needed for emoji characters)
Then most safe option is to mysql_dump all databases via mysqldump, except for mysql (actually you need mysql.user table, but it's safer to recreate, other settings tables may and most probably will not fit)
Try restoring on staging server first, to see if restored db works the way you expect it to
I've scoured the MySql website to see if they have compatibility listings for MySQL Workbench, but have not found anything. Does anyone know if 6.0.x can connect to 5.5.x databases? I'd rather not install and then have to roll back.
MySQL Workbench can connect to most MySQL server versions, but that is probably not the primary question. You should rather ask what minimum version it can work with. MySQL Workbench requires at least MySQL 5.0 and can work with any MySQL server after that (including the new 5.7). Some features like authentication plugin or performance schema support require higher server versions, though.