[mythtv-users] seeking upgrade advice 0.20 -> 0.23 backend database

[Ross Camm]

I finally have managed to compile and make install .23 under etch in
/usr/local

I still have 0.20 installed via deb packages. I don't want to remove this
as mythtv is a critical household application...sure many of you
understand ;)

would the safest & easiest way to test if 0.23 is going to run and migrate
the 0.20 database be to:

1. stop mythbackend .20
2. stop mysql
3. cp -a /var/lib/mysql /safeplace
4. start mysql
5. start mythbackend 0.23  /usr/local/bin/mythbackend
6. see what works and what doesn't
7. if all goes bad, restore /var/lib/mysql with mysql stopped

since I compiled myself, are myth 0.23 log files and config files also
expected to be found under /usr/local ? I expect so.

appreciate the tips so far...thanks

if this all manages to work I will try 0.24...one step at a time





> On Tue, Jan 4, 2011 at 4:11 PM, Ross Camm <rossco at whyza.net> wrote:
>> I have been running on mythtv 0.20 for over 4 years and have not wanted
>> to
>> upgrade ( its complicated )...until now
>>
>> I want to go from 0.20 to 0.23 as unbuntu 10.04 is on 0.23, which is on
>> all clients.
>
> Recommendation: use the Mythbuntu AutoBuilds repo and upgrade to 0.24.
>
>> the reason for finally upgrading is moving  to HD on ASUS AT5IONT-I and
>> it
>> needs VDPAU...not available in 0.20...so time to move forward.
>>
>> Backend questions are:
>>
>> 1. Can I upgrade straight from 0.20 to 0.23 using ? Will the database be
>> migrated in this case ? Do I need to run scripts or does an upgrade
>> magically happen upon backend startup ? Any known issues ?
>
> I believe the backend and frontend will upgrade the database as
> needed. I would DEFINITELY backup your database before doing so though
> either way.
> http://www.mythtv.org/wiki/Database_Backup_and_Restore
>
> I would also consider, if you don't have any important current
> recordings, to start from a fresh database. There are so many new
> settings, options, etc. that forcing yourself to go through all them
> in setting up your systems for the much newer version may be
> beneficial.
> There is a method to do a partial restore of your recordings and rules
> documented in the wiki page I just linked. May work for such a large
> jump in versions, but I'm not sure.
>
>> 2. My current backend is Debian Lenny ( 4.0 ). I know I have no hope of
>> installing 0.23 as a debian package on this, but if I compile the source
>> on ubuntu 10.04, what are the chances of a 'make install' on Lenny
>> resulting in a successful backend running ? Will this also perform an
>> 'upgrade' of the database ?
>
> Why not just compile from source on the backend instead of on another
> machine?
>
>> 3. Finally, if I can't get 0.23 on lenny, how would I migrate the
>> backend
>> to ubuntu 10.4 to then 'upgrade/install' using deb package management,
>> while still keeping the database intact ?
>
> see the page I linked. you would backup your database, copy to a (or
> multiple) secure locations, then when the new system is up and ready,
> restore the database.
>
>
> --
> Steve
> http://www.mythtv.org/wiki/User:Steveadeff
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