Re: [gentoo-dev] Re: News item: MySQL 5.1 bump

[Robin H. Johnson]

On Tue, Feb 16, 2010 at 06:11:13AM +0000, Duncan wrote:
> > - If you actually ran mysqld as your own user (Akonadi w/ internal MySQL
> >   instance), use the mysql_upgrade with suitable parameters to connect
> >   to the database (as to what those are, you're the one running it, not
> >   me).
> It's automagic from here.  I just run kde.  What it does, I don't know.  I
> just don't want it to break!  (And upgrade implications will get worse
> with kde 4.5 in August, as kmail will be depending on it then, and users
> tend to get rather cross when their mail store gets hosed!  With 4.4, it's
> mainly the address book.)
All of that is under the Akonadi side of KDE. I really don't think
storing mail inside MySQL is going to be a good idea.

> >> Perhaps a note for kde users telling them where their databases are
> >> located so they /can/ back them up, etc.)
> > I've got no idea where they are located, I just focus on MySQL itself. I
> > wasn't even aware of Akonadi's usage until a couple of weeks ago.
> What I was suggesting, between the lines, is to coordinate with the kde
> project.  They may want to create their own upgrade document, which might
> be listed in the news release or in a separate one (testing for both mysql
> and kde).  Hopefully they reply to this thread with whatever their
> concerns there might be.
I announced it 2 weeks ago, on February 1st, Message-Id:
robbat2-20100201T012126-637073772Z@××××××××××××××.net I just hadn't
gotten to actually doing it yet due to travel and getting sick on my way
home (and Delta doing everything in their power to screw things up, I
still haven't got one of my pieces of luggage back yet).

As soon as the 72 hours on this news announcement are done, I'm going to
be unmasking it. I do expect most of the breakage to come from the
client libraries, and NOT any actual data storage issues. If MySQL
detects that it's not safe to access a table, it does give you a
suitable error to repair the table.

mysql_upgrade is actually really just running 'CHECK TABLE ... FOR
UPGRADE;' && 'REPAIR TABLE ...' on tables with something that needs to
change. Doing a 'REPAIR TABLE ...' globally will cover you if you don't
have any other way to issue the check statements manually.

That is of course me assuming that you have a way to issue 'REPAIR TABLE
...', because that's a critical MySQL command for the DBA/user to know
in managing their data.

-- 
Robin Hugh Johnson
Gentoo Linux: Developer, Trustee & Infrastructure Lead
E-Mail     : robbat2@g.o
GnuPG FP   : 11AC BA4F 4778 E3F6 E4ED  F38E B27B 944E 3488 4E85