Re: Upcoming KDEPIM changes in unstable (KMail, Kontact, KOrganizer, etc)

[Martin Steigerwald <martin@lichtvoll.de>]

Am Sonntag, 3. Juli 2016, 19:17:19 CEST schrieb Martin Steigerwald:
> And I wouldn´t use export/import, it never worked for me.

No, thats not quite accurate, I am not sure I tried it after having read from 
many users in upstream mailinglist, that it often does not work. Well I think 
I once used it and it was a desaster, but thats really a long, long time ago, 
so I am not quite sure. But I think from back then I found that in case you 
need to import something: Create a suitable resource for the data you want to 
import, point it at the data and let it index it is way more reliable and 
faster.

Still the automatic migration will likely always be faster and require less 
manual work than any other approach – none in the optimal case, so I suggest 
you always just try to let automatic migration do its shop.

Be prepared that it will do a MySQL database schema upgrade, add in new 
indexes and also use a two-level file_db_data, so once you upgrade akonadi-
server there is no easy and supported way back. So again, have a backup, just 
in case.

And be prepared that it can take a longer time where your Akonadi is basically 
busy with the migration and not responding, at least not timely, to anything 
else. Depending on whether your system has an SSD, migration may be quite 
quick, but for harddisk based systems with huge amounts of mails and a large 
MySQL database it can take several hours I think. There may or may not be some 
progress indication in Akonadiconsole.

Thanks,
-- 
Martin