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
Related
I want to transfer my Ruby on Rails project to another platform.
Currently my RDS is running over mySQL 5.5 which is discontinued, will it be ok to utilize mySQL 5.7 instead and will database migration be affected?
What could be consequences?
Mysql does not support direct upgrade skipping versions, so you'll have to upgrade in steps: 5.5->5.6->5.7, and then, maybe, 8 (actually, sometimes for simple databases a 5.5->5.7 jump might work, but it is not guaranteed and you may loose data).
make a backup
You need to have compatible mysql2 gem version (fresh enough)
See MySQL changes(5.6 and 5.7) and corresponding upgrade guides to:
make your app compatible (replace deprecated/removed features, adapt for new defaults etc.)
migrate data and mysql itself (if your database is big or under constant load, logical dumping+loading might not be acceptable), usually it involves upgrading to most recent patch version and then jumping to next version, sometimes running mysql migration tool
plan for a downtime (in worst case - a backup restore)
To minimize downtime - you can make use of mysql's ability to create a mixed-version cluster (add 5.6 slave to your present 5.5 master, then promote in to master, and so on)
I currently host around 400 websites and would like to migrate from MySQL 5.5 to MariaDB 10. The server is running WHM/cPanel 11.58 (CloudLinux).
I see the option to change the installation but, before I go ahead and do it, I would like to know whether it's a "straightforward" process. I am struggling to find any information online that is clear cut and explains whether MySQL databases/tables are compatible 100% with MariaDB.
Yes, it's possible to upgrade it but I will suggest you first upgrade your mysql version to 5.6 and then upgrade it to MariaDB, Also before upgrading your mysql verison I will suggest you please take backup of your all databases in .sql format.
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
Is it possible to use a newer version of mysqldump to export data that is compatible with older versions of mysql?
Specifically, I am using mysqldump to export data from version 5.5.44 to 5.1.55.
I was getting the error
Unknown collation: 'utf8mb4_unicode_ci'
when trying to import data from the 5.5.44 to the 5.1.55 server
I know in the manual, it says that the compatible option can be used with one of the following names: ansi, mysql323, mysql40, postgresql, oracle, mssql, db2, maxdb, no_key_options, no_table_options, or no_field_options, but I'm not sure if that is what I want in this situation.
If I really wanted a sure-fire solution I would use mysql40 - 5.1 can definitely load a dump from 4.0, MySQL philosophy is backwards compatibility to a fault. However, it is quite likely to work as is - dumps have not changed very much between 5.1 and 5.5.
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.