NMIG is an app, intended to make a process of migration from MySQL to PostgreSQL as easy and smooth as possible.
1. Create a new database.
Sample: CREATE DATABASE my_postgresql_database;
2. Download NMIG package and put it on the machine running your PostgreSQL (not mandatory, but preferably).
Sample: /path/to/nmig
3. Edit configuration file located at /path/to/nmig/config.json
with correct details.
4. Go to nmig directory, install dependencies, and run the app
Sample:
$ cd /path/to/nmig
$ npm install
$ node nmig.js
5. If a disaster took place during migration (for what ever reason) - simply restart the process
$ node nmig.js
NMIG will restart from the point it was stopped at.
6. At the end of migration check log files, if necessary.
Log files will be located under "logs_directory" folder in the root of the package.
Note: "logs_directory" will be created during script execution.
7. In case of any remarks, misunderstandings or errors during migration,
please feel free to email me
anatolyuss@gmail.com
Current version is 2.5.0
(major version . improvements . bug fixes)
Tested using MySQL Community Server (5.7.17) and PostgreSQL (9.5).
The entire process of migration 59.9 MB database (53 tables, 581275 rows),
which includes data types mapping, creation of tables, constraints, indexes,
PKs, FKs, migration of data, garbage-collection (VACUUM) and analyzing the newly created
PostgreSQL database took 1 minute 2 seconds.
Note: it is highly recommended to VACUUM newly created database!
Just keep in mind, that VACUUM is a very time-consuming procedure.
So if you are short in time - disable VACUUM via config.json ("no_vacuum" parameter).
Such step will save you ~25% of migration time.
Errors/Exceptions are not passed silently.
Any error will be immediately written into the error log file.
NMIG is available under "GNU GENERAL PUBLIC LICENSE" (v. 3)
http://www.gnu.org/licenses/gpl.txt.