port load and unload commands with respect to MySql

Scott Haneda talklists at newgeo.com
Fri Mar 5 00:34:19 PST 2010

I have never been particularly great about the MySql shutdown procedure.

I believe this is the correct method:
    /opt/local/bin/mysqladmin5 -u root -p shutdown

This will allow all tables to close up clean, any insert delayed's will have time to finish, and MySql will be in a state that is actually shut down without any data loss.  Or so that is how it is supposed to work.

What do I usually do? `sudo reboot`
At least on my dev machine, which of course, does not do much harm.

I am more and more trying to use the `port load` and `port unload` commands, because they are convenient, and simple to remember.

First question:
Does `port contents` always omit plist files, aka launchd scripts from output?
    $file /Library/LaunchDaemons/org.macports.mysql5.plist 
    /Library/LaunchDaemons/org.macports.mysql5.plist: XML  document text

    $port contents mysql5 | grep macports
    > Nothing returned

Looking at:
Do the contents of those files mean I am to use `port start mysql5` and `port stop mysql5` and `port restart mysql5`?  It does not seem to work, "Unrecognized action stop".

But `sudo port unload mysql5` does work, however, it did not ask me for a MySql password, which means it did not run `mysqladmin5 -u root -p shutdown`, correct?

The plist calls
which does *not* have the word 'shutdown' in it anywhere, which the stop command calls
    /opt/local/share/mysql5/mysql/mysql.server stop
But looking over that code, I see nothing to ensure me I am getting a clean shutdown.

    $/opt/local/bin/mysqladmin5 -u root -p shutdown
    Enter password: 
    $mysql5 -u root -p  // Try to connect, should not be able to...
    Enter password: 
    ERROR 2002 (HY000): Can't connect to local MySQL server through 
    socket '/opt/local/var/run/mysql5/mysqld.sock' (2)
Using my "normal" method I have tried to remember to use, seems to indeed stop it.  Not sure if and when launchd is going to come back along and bring it back up, any ideas on that one?

I guess the correct thing to do is going to be:
    $sudo port unload mysql5
    $/opt/local/bin/mysqladmin5 -u root -p shutdown

That will keep launchd from getting back up again, and it will stop mysql5 cleanly?  But then I have to `sudo port load mysql5` after the machine comes back up, and Apache will more than likely already started to serve errors if it is a live server.  This being because the MySql launchd item was unloaded.

If all this is correct, what in the heck is /opt/local/etc/LaunchDaemons/org.macports.mysql5/mysql5.wrapper for anyway?

Is there any way to get the `port unload` for MySql to be more specific to the needs of MySql in regards to shutdown?  What are the suggested methods for making sure when you issue a Finder based restart, shutdown, or CLI based `reboot`, that MySql cleanly goes away, or is it always assumed an admin will take steps to take a system down in an orderly way?

I have read this over twice now:
and I believe _maybe_ that is saying that `port unload` will in fact be a safe way to shut down, but it is not 100% clear to me either.

Oh, also, on a non MacPorts system, with MySql installed from MySql's binary installer for Mac OS X I have files put into /usr/local/mysql with data in /usr/local/mysql/data

    Permissions on /usr/local/mysql/data are:
    drwxr-x---  76 mysql  wheel   2584 31 Dec  1969 data

MacPorts has a layout of /opt/local/var/db/mysql5 with all db files right there.  I can `cd` into the directory in which all the data files are, which on the non MacPorts system, permissions prevent me from doing so.

    drwxr-xr-x  8 _mysql  _mysql  272 Mar  4 23:52 mysql5
MySql Binary Installer Mac OS X
    drwxr-x---  76 mysql  wheel   2584 31 Dec  1969 data

Am I reading the MySql docs wrong about layout at ( http://dev.mysql.com/doc/refman/5.0/en/installation-layouts.html ) ?

It would seem to me that MacPorts "mysql5" should be named "data", or I would take it one deeper and add "data" a level down: /opt/local/var/db/mysql5/data

The binary installer seems to be a little cleaner:
     - versus - 

Is there any reason to not do something like:

As well as the same for "sql-bench" (which I can not even find), and everything else that MySql installs.

I know it is a long email, but I got involved in a problem, and these are the things I ran into along the way.

* If any of my paths are off a bit, I apologize, I have a feeling most of you are going to get what I am after here. 

** Did the MySql socket location change, or something else with regards to php, mysql, and apache, as I absolutely had to edit php.ini to get it to work.  phpInfo() had no default socket set. Or is that still part of ( https://trac.macports.org/ticket/21250 ) and we are just not get to see resolution to that ticket?

Thank you.

Scott * If you contact me off list replace talklists@ with scott@ * 

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