[gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Jarry]

Hi,
what is the proper way of updating mysql? I did it as with
any other package, following this sequence:

emerge --ask --update --deep --newuse world
[ebuild  N    ] net-misc/curl-7.20.0-r2  USE="idn ipv6 ssl -ares -gnutls 
-kerberos -ldap -libssh2 -nss -test"
[ebuild  N    ] dev-util/cmake-2.8.1-r2  USE="ncurses -emacs -qt4 
-vim-syntax"
[ebuild     U ] dev-db/mysql-5.1.50 [5.0.90-r2] USE="-pbxt% -xtradb%"
[ebuild     U ] virtual/mysql-5.1 [5.0]
emerge --depclean
revdep-rebuild
/etc/init.d/mysqld stop
/etc/init.d/mysqld start

But this is apparently not the proper way, because after
restarting the server, apache does not show my web-page
reporting there is no such a database. I checked it with
phpmyadmin, and really, there is absolutely no database
in mysql!

I quickly restored backup version which I have done just
before trying mysql-update, so my web-site is up and running.
Now I would like to update mysql the right way, I but do not
know how to do it...

Jarry

-- 
_______________________________________________________________
This mailbox accepts e-mails only from selected mailing-lists!
Everything else is considered to be spam and therefore deleted.

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 1570 bytes --]

On Tuesday 31 August 2010 18:32:04 Jarry wrote:
> Hi,
> what is the proper way of updating mysql? I did it as with
> any other package, following this sequence:
> 
> emerge --ask --update --deep --newuse world
> [ebuild  N    ] net-misc/curl-7.20.0-r2  USE="idn ipv6 ssl -ares -gnutls
> -kerberos -ldap -libssh2 -nss -test"
> [ebuild  N    ] dev-util/cmake-2.8.1-r2  USE="ncurses -emacs -qt4
> -vim-syntax"
> [ebuild     U ] dev-db/mysql-5.1.50 [5.0.90-r2] USE="-pbxt% -xtradb%"
> [ebuild     U ] virtual/mysql-5.1 [5.0]
> emerge --depclean
> revdep-rebuild
> /etc/init.d/mysqld stop
> /etc/init.d/mysqld start
> 
> But this is apparently not the proper way, because after
> restarting the server, apache does not show my web-page
> reporting there is no such a database. I checked it with
> phpmyadmin, and really, there is absolutely no database
> in mysql!
> 
> I quickly restored backup version which I have done just
> before trying mysql-update, so my web-site is up and running.
> Now I would like to update mysql the right way, I but do not
> know how to do it...

Hi Jarry,

Some years ago I ran into some similar problem, I can't recall exactly what.  
Lost in folklore (wiki?) were some instructions to first stop mysql before you 
update it and I have been following them since.

I stop apach & mysql, run the update,  dispatch-conf and then restart them 
both.  Haven't had problems since.

There may be a better way for doing this - in which case others who know 
better will hopefully chime in.
-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Aniruddha]

On Tuesday 31 August 2010 20:30:55 Mick wrote:
> > But this is apparently not the proper way, because after
> > restarting the server, apache does not show my web-page
> > reporting there is no such a database. I checked it with
> > phpmyadmin, and really, there is absolutely no database
> > in mysql!
> > 
> > I quickly restored backup version which I have done just
> > before trying mysql-update, so my web-site is up and running.
> > Now I would like to update mysql the right way, I but do not
> > know how to do it...
> 
> Hi Jarry,
> 
> Some years ago I ran into some similar problem, I can't recall exactly
> what. Lost in folklore (wiki?) were some instructions to first stop mysql
> before you update it and I have been following them since.
> 
> I stop apach & mysql, run the update,  dispatch-conf and then restart them
> both.  Haven't had problems since.
> 
> There may be a better way for doing this - in which case others who know
> better will hopefully chime in.

I'm curious as well. Imo it shouldn't be necessary to stop mysql server for 
each update.

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

2010/9/1 Aniruddha <mailingdotlist@gmail.com>:
> On Tuesday 31 August 2010 20:30:55 Mick wrote:
>> > But this is apparently not the proper way, because after
>> > restarting the server, apache does not show my web-page
>> > reporting there is no such a database. I checked it with
>> > phpmyadmin, and really, there is absolutely no database
>> > in mysql!
>> >
>> > I quickly restored backup version which I have done just
>> > before trying mysql-update, so my web-site is up and running.
>> > Now I would like to update mysql the right way, I but do not
>> > know how to do it...
>>
>> Hi Jarry,
>>
>> Some years ago I ran into some similar problem, I can't recall exactly
>> what. Lost in folklore (wiki?) were some instructions to first stop mysql
>> before you update it and I have been following them since.
>>
>> I stop apach & mysql, run the update,  dispatch-conf and then restart them
>> both.  Haven't had problems since.
>>
>> There may be a better way for doing this - in which case others who know
>> better will hopefully chime in.
>
> I'm curious as well. Imo it shouldn't be necessary to stop mysql server for
> each update.

Actually, this problem may be more sinister ... a bug?

I also updated to the latest stable and as soon as I tried to restart
apache I got:
=========================================
# /etc/init.d/apache2 start
 * apache2 has detected an error in your setup:
apache2: Syntax error on line 155 of /etc/apache2/httpd.conf: Syntax error on
line 4 of /etc/apache2/modules.d/70_mod_php5.conf: Cannot load
/usr/lib/apache2/modules/libphp5.so into server: libmysqlclient.so.15: cannot
open shared object file: No such file or directory
=========================================

What the ... ?

Line 155 of my /etc/apache2/httpd.conf says:

Include /etc/apache2/modules.d/*.conf

Line 4 of /etc/apache2/modules.d/70_mod_php5.conf, says:

LoadModule php5_module    modules/libphp5.so

Also, I seem to have modules/libphp5.so and is world readable:

$ ls -la /usr/lib/apache2/modules/libphp5.so
-rw-r--r-- 1 root root 5720576 Aug 13 20:09 /usr/lib/apache2/modules/libphp5.so


I am downgrading now before a lynch mob arrives, but has anyone else
run into this problem?

PS. I'm running www-servers/apache-2.2.16
-- 
Regards,
Mick

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Alan McKinnon]

Apparently, though unproven, at 22:15 on Wednesday 01 September 2010, Mick did 
opine thusly:

> 2010/9/1 Aniruddha <mailingdotlist@gmail.com>:
> > On Tuesday 31 August 2010 20:30:55 Mick wrote:
> >> > But this is apparently not the proper way, because after
> >> > restarting the server, apache does not show my web-page
> >> > reporting there is no such a database. I checked it with
> >> > phpmyadmin, and really, there is absolutely no database
> >> > in mysql!
> >> > 
> >> > I quickly restored backup version which I have done just
> >> > before trying mysql-update, so my web-site is up and running.
> >> > Now I would like to update mysql the right way, I but do not
> >> > know how to do it...
> >> 
> >> Hi Jarry,
> >> 
> >> Some years ago I ran into some similar problem, I can't recall exactly
> >> what. Lost in folklore (wiki?) were some instructions to first stop
> >> mysql before you update it and I have been following them since.
> >> 
> >> I stop apach & mysql, run the update,  dispatch-conf and then restart
> >> them both.  Haven't had problems since.
> >> 
> >> There may be a better way for doing this - in which case others who know
> >> better will hopefully chime in.
> > 
> > I'm curious as well. Imo it shouldn't be necessary to stop mysql server
> > for each update.
> 
> Actually, this problem may be more sinister ... a bug?
> 
> I also updated to the latest stable and as soon as I tried to restart
> apache I got:
> =========================================
> # /etc/init.d/apache2 start
>  * apache2 has detected an error in your setup:
> apache2: Syntax error on line 155 of /etc/apache2/httpd.conf: Syntax error
> on line 4 of /etc/apache2/modules.d/70_mod_php5.conf: Cannot load
> /usr/lib/apache2/modules/libphp5.so into server: libmysqlclient.so.15:
> cannot open shared object file: No such file or directory
> =========================================
> 
> What the ... ?
> 
> Line 155 of my /etc/apache2/httpd.conf says:
> 
> Include /etc/apache2/modules.d/*.conf
> 
> Line 4 of /etc/apache2/modules.d/70_mod_php5.conf, says:
> 
> LoadModule php5_module    modules/libphp5.so
> 
> Also, I seem to have modules/libphp5.so and is world readable:
> 
> $ ls -la /usr/lib/apache2/modules/libphp5.so
> -rw-r--r-- 1 root root 5720576 Aug 13 20:09
> /usr/lib/apache2/modules/libphp5.so
> 
> 
> I am downgrading now before a lynch mob arrives, but has anyone else
> run into this problem?
> 
> PS. I'm running www-servers/apache-2.2.16


You got so close to the real answer, just one more step :-)

$ ldd /usr/lib64/apache2/modules/libphp5.so | grep mysql
        libmysqlclient_r.so.16 => /usr/lib64/mysql/libmysqlclient_r.so.16 
(0x00007f185d528000)

Think this through: you have a complex piece of software with it's config in 
memory. A library that uses a library uses a library. Then you remove that 
last library and replace it with version x+1.

How do you expect the library in the middle of the chain to know about that? 
Via magic? Voodoo? Some automatic-check-if-stuff-changed-cron-job?

No, you just simply restart services that use things that changed, especially 
if they used (then closed) the file you just changed.

You might also need revdep-rebuild to get everything back 100%. It's all just 
situation-normal for a source based distro. Nothing you can, or should, try to 
"fix".


-- 
alan dot mckinnon at gmail dot com

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Dale]

Mick wrote:
> 2010/9/1 Aniruddha<mailingdotlist@gmail.com>:
>    
>> On Tuesday 31 August 2010 20:30:55 Mick wrote:
>>      
>>>> But this is apparently not the proper way, because after
>>>> restarting the server, apache does not show my web-page
>>>> reporting there is no such a database. I checked it with
>>>> phpmyadmin, and really, there is absolutely no database
>>>> in mysql!
>>>>
>>>> I quickly restored backup version which I have done just
>>>> before trying mysql-update, so my web-site is up and running.
>>>> Now I would like to update mysql the right way, I but do not
>>>> know how to do it...
>>>>          
>>> Hi Jarry,
>>>
>>> Some years ago I ran into some similar problem, I can't recall exactly
>>> what. Lost in folklore (wiki?) were some instructions to first stop mysql
>>> before you update it and I have been following them since.
>>>
>>> I stop apach&  mysql, run the update,  dispatch-conf and then restart them
>>> both.  Haven't had problems since.
>>>
>>> There may be a better way for doing this - in which case others who know
>>> better will hopefully chime in.
>>>        
>> I'm curious as well. Imo it shouldn't be necessary to stop mysql server for
>> each update.
>>      
> Actually, this problem may be more sinister ... a bug?
>
> I also updated to the latest stable and as soon as I tried to restart
> apache I got:
> =========================================
> # /etc/init.d/apache2 start
>   * apache2 has detected an error in your setup:
> apache2: Syntax error on line 155 of /etc/apache2/httpd.conf: Syntax error on
> line 4 of /etc/apache2/modules.d/70_mod_php5.conf: Cannot load
> /usr/lib/apache2/modules/libphp5.so into server: libmysqlclient.so.15: cannot
> open shared object file: No such file or directory
> =========================================
>
> What the ... ?
>
> Line 155 of my /etc/apache2/httpd.conf says:
>
> Include /etc/apache2/modules.d/*.conf
>
> Line 4 of /etc/apache2/modules.d/70_mod_php5.conf, says:
>
> LoadModule php5_module    modules/libphp5.so
>
> Also, I seem to have modules/libphp5.so and is world readable:
>
> $ ls -la /usr/lib/apache2/modules/libphp5.so
> -rw-r--r-- 1 root root 5720576 Aug 13 20:09 /usr/lib/apache2/modules/libphp5.so
>
>
> I am downgrading now before a lynch mob arrives, but has anyone else
> run into this problem?
>
> PS. I'm running www-servers/apache-2.2.16
>    

I'm no expert on this package so take this with a grain of salt.  Mine 
just updated and portage said to run "emerge @preserved-rebuild" which I 
did.  Thing is, one of the packages failed to emerge so here I sit.  The 
error says something is missing which is the same reason the "emerge 
@preserved-rebuild" won't finish.

So, looks like you need to rebuild some stuff but don't hold your breath 
on being able to.  There is a thread on the forums already if you want 
to monitor it.

http://forums.gentoo.org/viewtopic-t-842671.html

Dale

:-)  :-)

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Alex Schuster]

Dale writes:

> I'm no expert on this package so take this with a grain of salt.  Mine
> just updated and portage said to run "emerge @preserved-rebuild" which
> I did.  Thing is, one of the packages failed to emerge so here I sit. 
> The error says something is missing which is the same reason the
> "emerge @preserved-rebuild" won't finish.
> 
> So, looks like you need to rebuild some stuff but don't hold your
> breath on being able to.  There is a thread on the forums already if
> you want to monitor it.

I think it's not an urgent problem when this happens. With portage 2.2 and 
the preserve-libs FEATURE, old libraries are not deleted when an update 
installs new, incompatible library. This happens when emerge @preserved-
rebuild has finished rebuilding all packages using the old library, so 
they now use the new one.

Without this feature, the old library is deleted after the update, and you 
need to use revdep-rebuild to rebuild all the stuff that uses the no 
longer existing library. I always thought of this as a big problem with 
Gentoo, and it's great that it no lonoger is.

	Wonko

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Tanstaafl]

On 2010-09-01 5:18 PM, Alex Schuster <wonko@wonkology.org> wrote:
> I think it's not an urgent problem when this happens. With portage
> 2.2 and the preserve-libs FEATURE,

You are assuming everyone runs unstable portage??

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 462 bytes --]

On Wednesday 01 September 2010 22:25:39 Tanstaafl wrote:
> On 2010-09-01 5:18 PM, Alex Schuster <wonko@wonkology.org> wrote:
> > I think it's not an urgent problem when this happens. With portage
> > 2.2 and the preserve-libs FEATURE,
> 
> You are assuming everyone runs unstable portage??

I'm running vanilla here, so will run revdep-rebuild when I get a minute.  
Until then I downgraded, because I was being shouted at ...  O_O
-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Alex Schuster]

Tanstaafl writes:

> On 2010-09-01 5:18 PM, Alex Schuster <wonko@wonkology.org> wrote:
> > I think it's not an urgent problem when this happens. With portage
> > 2.2 and the preserve-libs FEATURE,
> 
> You are assuming everyone runs unstable portage??

No, but I replied to Dale, and he apparently does.

	Wonko

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Dale]

Alex Schuster wrote:
> Tanstaafl writes:
>
>    
>> On 2010-09-01 5:18 PM, Alex Schuster<wonko@wonkology.org>  wrote:
>>      
>>> I think it's not an urgent problem when this happens. With portage
>>> 2.2 and the preserve-libs FEATURE,
>>>        
>> You are assuming everyone runs unstable portage??
>>      
> No, but I replied to Dale, and he apparently does.
>
> 	Wonko
>
>
>    

I do run unstable portage.  My point was that the upgrade breaks a 
dependency and that the dependency won't complete the compile process.  
So, if a person has not yet upgraded, you may be wise to wait until this 
gets fixed.

This would be good advice regardless of what version of portage a person 
is using.

Dale

:-)  :-)

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[kashani]

On 9/1/2010 1:00 PM, Aniruddha wrote:
> On Tuesday 31 August 2010 20:30:55 Mick wrote:
>>> But this is apparently not the proper way, because after
>>> restarting the server, apache does not show my web-page
>>> reporting there is no such a database. I checked it with
>>> phpmyadmin, and really, there is absolutely no database
>>> in mysql!
>>>
>>> I quickly restored backup version which I have done just
>>> before trying mysql-update, so my web-site is up and running.
>>> Now I would like to update mysql the right way, I but do not
>>> know how to do it...
>>
>> Hi Jarry,
>>
>> Some years ago I ran into some similar problem, I can't recall exactly
>> what. Lost in folklore (wiki?) were some instructions to first stop mysql
>> before you update it and I have been following them since.
>>
>> I stop apach&  mysql, run the update,  dispatch-conf and then restart them
>> both.  Haven't had problems since.
>>
>> There may be a better way for doing this - in which case others who know
>> better will hopefully chime in.
>
> I'm curious as well. Imo it shouldn't be necessary to stop mysql server for
> each update.
>

	I did in place upgrades from 5.0.12 or so on up to 5.0.77 or so. You're 
unlikely to have problems upgrading Mysql within 5.0.x. If you're moving 
up to 5.1, I would definitely stop inserts into Mysql, dump mysql, stop 
mysql, make a copy of /var/lib/mysql just in case, then upgrade to 5.1. 
Mysql should be able to upgrade your database in place, but it might 
not. If mysql-update doesn't work, importing a dumb is the most reliable 
way to get your data into 5.1.
	As other people have pointed out you'll need to revdep-rebuild or 
preserve the older client libs.

kashani

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Dale]

Mick wrote:
> On Wednesday 01 September 2010 22:25:39 Tanstaafl wrote:
>    
>> On 2010-09-01 5:18 PM, Alex Schuster<wonko@wonkology.org>  wrote:
>>      
>>> I think it's not an urgent problem when this happens. With portage
>>> 2.2 and the preserve-libs FEATURE,
>>>        
>> You are assuming everyone runs unstable portage??
>>      
> I'm running vanilla here, so will run revdep-rebuild when I get a minute.
> Until then I downgraded, because I was being shouted at ...  O_O
>    

I added "=dev-db/mysql-5.1.50-r1" to package.keywords and everything 
compiled cleanly.  Roach report here.

http://bugs.gentoo.org/show_bug.cgi?id=335615

Hope that helps.

Dale

:-)  :-)

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 776 bytes --]

On Thursday 02 September 2010 10:55:03 Dale wrote:
> Mick wrote:
> > On Wednesday 01 September 2010 22:25:39 Tanstaafl wrote:
> >> On 2010-09-01 5:18 PM, Alex Schuster<wonko@wonkology.org>  wrote:
> >>> I think it's not an urgent problem when this happens. With portage
> >>> 2.2 and the preserve-libs FEATURE,
> >> 
> >> You are assuming everyone runs unstable portage??
> > 
> > I'm running vanilla here, so will run revdep-rebuild when I get a minute.
> > Until then I downgraded, because I was being shouted at ...  O_O
> 
> I added "=dev-db/mysql-5.1.50-r1" to package.keywords and everything
> compiled cleanly.  Roach report here.
> 
> http://bugs.gentoo.org/show_bug.cgi?id=335615
> 
> Hope that helps.

Thanks Dale!

 :-)

-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 1981 bytes --]

On Thursday 02 September 2010 06:10:05 kashani wrote:
> On 9/1/2010 1:00 PM, Aniruddha wrote:
> > On Tuesday 31 August 2010 20:30:55 Mick wrote:
> >>> But this is apparently not the proper way, because after
> >>> restarting the server, apache does not show my web-page
> >>> reporting there is no such a database. I checked it with
> >>> phpmyadmin, and really, there is absolutely no database
> >>> in mysql!
> >>> 
> >>> I quickly restored backup version which I have done just
> >>> before trying mysql-update, so my web-site is up and running.
> >>> Now I would like to update mysql the right way, I but do not
> >>> know how to do it...
> >> 
> >> Hi Jarry,
> >> 
> >> Some years ago I ran into some similar problem, I can't recall exactly
> >> what. Lost in folklore (wiki?) were some instructions to first stop
> >> mysql before you update it and I have been following them since.
> >> 
> >> I stop apach&  mysql, run the update,  dispatch-conf and then restart
> >> them both.  Haven't had problems since.
> >> 
> >> There may be a better way for doing this - in which case others who know
> >> better will hopefully chime in.
> > 
> > I'm curious as well. Imo it shouldn't be necessary to stop mysql server
> > for each update.
> 
> 	I did in place upgrades from 5.0.12 or so on up to 5.0.77 or so. You're
> unlikely to have problems upgrading Mysql within 5.0.x. If you're moving
> up to 5.1, I would definitely stop inserts into Mysql, 

How do you stop inserts?  Would this also apply to MyISAMs or only InnoDB?

> dump mysql, stop
> mysql, make a copy of /var/lib/mysql just in case, then upgrade to 5.1.
> Mysql should be able to upgrade your database in place, but it might
> not. If mysql-update doesn't work, importing a dumb is the most reliable
> way to get your data into 5.1.
> 	As other people have pointed out you'll need to revdep-rebuild or
> preserve the older client libs.
> 
> kashani

-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[kashani]

On 9/2/2010 11:12 AM, Mick wrote:
> On Thursday 02 September 2010 06:10:05 kashani wrote:
>> On 9/1/2010 1:00 PM, Aniruddha wrote:
>>> On Tuesday 31 August 2010 20:30:55 Mick wrote:
>>>>> But this is apparently not the proper way, because after
>>>>> restarting the server, apache does not show my web-page
>>>>> reporting there is no such a database. I checked it with
>>>>> phpmyadmin, and really, there is absolutely no database
>>>>> in mysql!
>>>>>
>>>>> I quickly restored backup version which I have done just
>>>>> before trying mysql-update, so my web-site is up and running.
>>>>> Now I would like to update mysql the right way, I but do not
>>>>> know how to do it...
>>>>
>>>> Hi Jarry,
>>>>
>>>> Some years ago I ran into some similar problem, I can't recall exactly
>>>> what. Lost in folklore (wiki?) were some instructions to first stop
>>>> mysql before you update it and I have been following them since.
>>>>
>>>> I stop apach&   mysql, run the update,  dispatch-conf and then restart
>>>> them both.  Haven't had problems since.
>>>>
>>>> There may be a better way for doing this - in which case others who know
>>>> better will hopefully chime in.
>>>
>>> I'm curious as well. Imo it shouldn't be necessary to stop mysql server
>>> for each update.
>>
>> 	I did in place upgrades from 5.0.12 or so on up to 5.0.77 or so. You're
>> unlikely to have problems upgrading Mysql within 5.0.x. If you're moving
>> up to 5.1, I would definitely stop inserts into Mysql,
>
> How do you stop inserts?  Would this also apply to MyISAMs or only InnoDB?

	Depends on what you can get away with on your system. Applies to both 
MyISAM and Innodb though generally it's easier to dump myisam tables.

1. restart Mysql with no network, dump, update, restart with network. 
This of course assumes you have no local clients but you can chmod 600 
the mysql.sock as well. I've done it this way in the past, but it's not 
terribly fancy. Works well in environment where you're not exactly sure 
what's writing to your db.

2. mysql -u root then FLUSH TABLES WITH READ LOCK while you're holding 
that connection open, mysqldump. I feel like I'm forgetting something 
here, but I think it is this simple.

3. Make a slave. Update it, test, all that fun stuff. Point to it, then 
update the master which is a slave of the slave. Works well, pretty 
easy, but you need to be comfortable with setting up replication.

4. LVM snapshots, still need to lock the tables, but usually it's fast. 
Good write up here.
http://www.mysqlperformanceblog.com/2006/08/21/using-lvm-for-mysql-backup-and-replication-setup/

5. Don't bother with a backup. shut down mysql, rsync -av 
/var/lib/mysql/ var/lib/mysql.orig/ , upgrade, start mysql. If it 
doesn't work shut down mysql and move the old dir back into place.

couple more links
http://dev.mysql.com/doc/refman/5.1/en/backup-policy.html
http://dev.mysql.com/doc/refman/5.1/en/backup-methods.html

kashani

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Jarry]

On 31. 8. 2010 20:30, Mick wrote:

> I stop apach&  mysql, run the update,  dispatch-conf and then restart them
> both.  Haven't had problems since.

I tried it that way:

/etc/init.d/apache2 stop
/etc/init.d/mysql stop
emerge --ask --update --deep --newuse world
emerge --depclean
revdep-rebuild
/etc/init.d/mysql start
/etc/init.d/apache2 start

Still the same: databases are gone, mysql is empty. Only users
are there. This is strange: how can updating mysql from one stable
version to higher stable cause complete loss of databases???

Jarry

-- 
_______________________________________________________________
This mailbox accepts e-mails only from selected mailing-lists!
Everything else is considered to be spam and therefore deleted.

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[kashani]

On 9/3/2010 10:53 PM, Jarry wrote:
> On 31. 8. 2010 20:30, Mick wrote:
>
>> I stop apach& mysql, run the update, dispatch-conf and then restart them
>> both. Haven't had problems since.
>
> I tried it that way:
>
> /etc/init.d/apache2 stop
> /etc/init.d/mysql stop
> emerge --ask --update --deep --newuse world
> emerge --depclean
> revdep-rebuild
> /etc/init.d/mysql start
> /etc/init.d/apache2 start
>
> Still the same: databases are gone, mysql is empty. Only users
> are there. This is strange: how can updating mysql from one stable
> version to higher stable cause complete loss of databases???
>
> Jarry
>

IIRC the default my.cnf changed for the worse in Gentoo's 5.1.x ebuild. 
Try making a copy of your original my.cnf and put it into place once 
you've upgraded. Else you may need to modify the mysql home and data 
paths in the new my.cnf to reflect where the database are actually 
installed.

kashani

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 1357 bytes --]

On Saturday 04 September 2010 22:43:01 kashani wrote:
> On 9/3/2010 10:53 PM, Jarry wrote:
> > On 31. 8. 2010 20:30, Mick wrote:
> >> I stop apach& mysql, run the update, dispatch-conf and then restart them
> >> both. Haven't had problems since.
> > 
> > I tried it that way:
> > 
> > /etc/init.d/apache2 stop
> > /etc/init.d/mysql stop
> > emerge --ask --update --deep --newuse world
> > emerge --depclean
> > revdep-rebuild
> > /etc/init.d/mysql start
> > /etc/init.d/apache2 start
> > 
> > Still the same: databases are gone, mysql is empty. Only users
> > are there. This is strange: how can updating mysql from one stable
> > version to higher stable cause complete loss of databases???
> > 
> > Jarry
> 
> IIRC the default my.cnf changed for the worse in Gentoo's 5.1.x ebuild.
> Try making a copy of your original my.cnf and put it into place once
> you've upgraded. Else you may need to modify the mysql home and data
> paths in the new my.cnf to reflect where the database are actually
> installed.

I just updated to mysql-5.1.50-r1  on a x86 box, ran revdep-rebuild which 
amidst others rebuilt apache and php and all is good now.  dispatch-conf 
updated only a couple of lines on the config file.

The default paths were not affected on any of the 5 mysql databases I'm 
running currently.
-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 1729 bytes --]

On Saturday 04 September 2010 23:30:55 you wrote:
> On Saturday 04 September 2010 22:43:01 kashani wrote:
> > On 9/3/2010 10:53 PM, Jarry wrote:
> > > On 31. 8. 2010 20:30, Mick wrote:
> > >> I stop apach& mysql, run the update, dispatch-conf and then restart
> > >> them both. Haven't had problems since.
> > > 
> > > I tried it that way:
> > > 
> > > /etc/init.d/apache2 stop
> > > /etc/init.d/mysql stop
> > > emerge --ask --update --deep --newuse world
> > > emerge --depclean
> > > revdep-rebuild
> > > /etc/init.d/mysql start
> > > /etc/init.d/apache2 start
> > > 
> > > Still the same: databases are gone, mysql is empty. Only users
> > > are there. This is strange: how can updating mysql from one stable
> > > version to higher stable cause complete loss of databases???
> > > 
> > > Jarry
> > 
> > IIRC the default my.cnf changed for the worse in Gentoo's 5.1.x ebuild.
> > Try making a copy of your original my.cnf and put it into place once
> > you've upgraded. Else you may need to modify the mysql home and data
> > paths in the new my.cnf to reflect where the database are actually
> > installed.
> 
> I just updated to mysql-5.1.50-r1  on a x86 box, ran revdep-rebuild which
> amidst others rebuilt apache and php and all is good now.  dispatch-conf
> updated only a couple of lines on the config file.
> 
> The default paths were not affected on any of the 5 mysql databases I'm
> running currently.

Oops!  I spake too soon!  :-(

I cannot access two databases.  Both have #mysql50# infront of the name of the 
original database.  What does this mean?  How do I fix it?  Other databases 
are fine, their names appearing without this strange prefix.
-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [gentoo-user] Proper way of updating mysql from 5.0.90-r2 to 5.1.50?

[Mick]

[-- Attachment #1: Type: Text/Plain, Size: 2603 bytes --]

On Sunday 05 September 2010 10:29:29 you wrote:
> On Saturday 04 September 2010 23:30:55 you wrote:
> > On Saturday 04 September 2010 22:43:01 kashani wrote:
> > > On 9/3/2010 10:53 PM, Jarry wrote:
> > > > On 31. 8. 2010 20:30, Mick wrote:
> > > >> I stop apach& mysql, run the update, dispatch-conf and then restart
> > > >> them both. Haven't had problems since.
> > > > 
> > > > I tried it that way:
> > > > 
> > > > /etc/init.d/apache2 stop
> > > > /etc/init.d/mysql stop
> > > > emerge --ask --update --deep --newuse world
> > > > emerge --depclean
> > > > revdep-rebuild
> > > > /etc/init.d/mysql start
> > > > /etc/init.d/apache2 start
> > > > 
> > > > Still the same: databases are gone, mysql is empty. Only users
> > > > are there. This is strange: how can updating mysql from one stable
> > > > version to higher stable cause complete loss of databases???
> > > > 
> > > > Jarry
> > > 
> > > IIRC the default my.cnf changed for the worse in Gentoo's 5.1.x ebuild.
> > > Try making a copy of your original my.cnf and put it into place once
> > > you've upgraded. Else you may need to modify the mysql home and data
> > > paths in the new my.cnf to reflect where the database are actually
> > > installed.
> > 
> > I just updated to mysql-5.1.50-r1  on a x86 box, ran revdep-rebuild which
> > amidst others rebuilt apache and php and all is good now.  dispatch-conf
> > updated only a couple of lines on the config file.
> > 
> > The default paths were not affected on any of the 5 mysql databases I'm
> > running currently.
> 
> Oops!  I spake too soon!  :-(
> 
> I cannot access two databases.  Both have #mysql50# infront of the name of
> the original database.  What does this mean?  How do I fix it?  Other
> databases are fine, their names appearing without this strange prefix.

I found the solution:

mysql > ALTER DATABASE `#mysql50#dbname` UPGRADE DATA DIRECTORY NAME;

as described here: 

http://mattiasgeniar.be/2010/08/07/mysql-upgrade-to-5-1-database-name-prefix-
mysql50/

I am not sure if this is related with the problem that the O/P had - 
disappearing databases.  The symptoms when the database with the new prefix is 
used to drive a CMS, was an error by apache saying that the database does not 
exist.  Of course, it does exist but its name now has a funny prefix.

Running mysql -u root -p and SHOW DATABASES; led me to finding out that the 
name had changed.  BTW, /var/lib/mysql still showed the non-prefixed db names.

Anyway, the above link was very helpful in resolving my problem.
-- 
Regards,
Mick

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 198 bytes --]