Is there a list anywhere or best practice instructions for update firebird databases from one version to another (in my case 2.1.3 to 2.5.2)?
I have seen backup and restore mentioned. I have updated from 1.5 to 2.1 in the past but that just worked i.e. I just installed the new firebird version, however I aware that this was probably just luck.
Regards
The Firebird 2.5.2 release notes has a section on compatibility issues that you need to be aware of when upgrading. Also the Firebird install directory contains additional info on upgrading in misc/upgrade/metadata/metadata_charset.txt. If your database has the incorrect metadata charset things might break (but AFAIK they would have been broken under Firebird 2.1 as well).
Technically you can upgrade to 2.5 without a backup and restore cycle on your database, but that means the On Disk Structure (ODS) of the database isn't upgraded to ODS 11.2, which could mean that you can't actually use some of the new features (or: performance improvements) introduced with the newer version. This could be worse if you are actually still on ODS 10.1 from Firebird 1.5.
Related
Other than looking over release notes, is there any way to find what versions of postgresql a given version of Flyway would support?
We are trying to upgrade some Postgresql 9.6 servers, so looking for the highest version of Flyway that would support Postgresql 9.6 so we can support both the existing 9.6 and a newer version of Postgresql.
It would be nice if there was a compatibility matrix of Flyway version against database version for each supported database in the docs but if such a thing exists, I haven't found it.
Instead, I've had to resort to a bit of git blame detective work.
For PostgreSQL, the minimum version is checked in PostgreSQLDatabase.java.
Viewing the Git Blame for that file, shows that the minimum community edition-supported version of PostgreSQL was changed to 10 in this commit, which first appeared in Flyway 8.0.0-beta1.
The previous minimum version was 9.5, which would work with your current database version of 9.6, and this can be found in Flyway 7.15.0, which is the latest release before 8.0.0-beta1.
I'm currently preparing to update my TYPO3 8.7 site to a 10.0, this update is set for April since that's when the LTS release will be. However, I was wondering if it's best practice to update to 9.5 first or to skip said version and go straight to 10.0.
Of course, backups will be made before doing any of this work and my server can handle the 10.0 version since we have an empty one running at the moment.
You should upgrade to 9.5 first to execute all the core & extension updaters (database)
see documentation
In my experience, you can just do the extension updaters and then go to the next version but you will have to fix your site extension in version 10. See the changelog for all breaking changes
Are there any known issues with database compatibility (GDB files) when switching Firebird Classic server from 64bit to 32bit or vice versa? I found information, that databases are compatible among Classic and Superserver, but this information was for Firebird 2.1 and I didn't find anything newer - http://firebirdsql.org/rlsnotesh/install210.html#install-model
The databases are compatible between Classic, SuperClassic and SuperServer as well as 32bit and 64bit within same Firebird version (between versions it's recommended (needed since FB3) to do backup & restore). It's the same code, same structure, just different execution model.
I was going through upgrade process of mysql server. It is mentioned that to upgrade from 4.1 to 5.5 we need to upgrade step by step like first to 5.0,5.1 ...5.4 and then 5.5.
I have some questions :
What if we directly upgrade from 4.1 to 5.5. What might get effected? functionality or problem related to upgrading
Chances to loose data ? Even though I'll take backup using 'mysqldump --all-data-base' option.
Lets say, I have two database. I'll take only two database backup. I'll install latest version of mysql 5.7 and load two database back. What are chances to loose data or get corrupted ?
I'm curious to know this. If anybody tried? Because I need to do upgrade in live server.
Is there any step by step document which tells exact steps to upgrade from 4.1 to 5.5 in linux server
Major new features added to MySQL 5.0 and 5.1 that may not work/won't work in 4.x can be located here:
MySQL 5.0 - http://dev.mysql.com/doc/refman/5.0/en/mysql-nutshell.html
MySQL 5.1 - http://dev.mysql.com/doc/refman/5.1/en/mysql-nutshell.html
I want to use Embedded FireBird with .NET 3.5. I have few queries:
(1) Are there any new developments done on the embedded version by the FireBird community?
(2) Are there any database file repair & optimize (shrink etc.) features in it?
(3) Does it supports Triggers, Foreign Keys, PL/SQL type of things etc.?
(1) Are there any new developments
done on the embedded version by the
FireBird community?
Yes, both the embedded and the client-server version are very active projects.
Using the same embedded version dll for ADO.NET for example, you can use the most recent version of the firebird engine dlls, even if the ADO.NET Firebird provider is not build for that version, but for a previous.
Check the issue tracker here: http://tracker.firebirdsql.org/secure/Dashboard.jspa
(2) Are there any database file repair
& optimize (shrink etc.) features in
it?
Yes, as described here: http://www.firebirdfaq.org/faq324/. You need to install the client-server version of firebird to use GFIX and GBAK from the command line. It is just a few megabytes.
Firebird does not have a "Compacting" feauture to shrink the database. You need to backup and then restore the database to do this. However you can use a firebird database for years without backup/restore (if you are lucky and the hard disk does not die). The only thing that you might need to do is to recalculate all indeces selectivity as described here: http://www.firebirdsql.org/dotnetfirebird/blog/2005/03/improving-query-performance-through.html
(3) Does it supports Triggers, Foreign
Keys, PL/SQL type of things etc.?
Yes. The 2.5 version of the embedded engine also supports accessing the same database file from different proccess at the same time.
Answering your questions:
The Embedded version is like a normal Firebird but encapsulated in a DLL and with some minor limitations. The Firebird Team just released some days ago the 2.5 version of SuperServer, Classic and Embedded flavors. More info at Embedded Firebird Server and Firebird website.
There are tools to repair and optimize databases. Check How to repair a corrupt Firebird database
Firebird is SQL:2003 conformant as stated in Firebird: SQL Conformance. It has triggers, foreiggn keys and stored procedures.
Hope that helps