Hi,
> Is it possible (stable and without data loss :-)) to run e.g.
>
> mysql-3.23.40 on Port 3306
>
> and
>
> mysql-4.0.20 on Port 3307
> on the same machine (SuSE Linux with 2.4.4-kernel)
yes
> !AND! on
> the same data-directory without the two versions conflicting (e.g. when both version
> would try to change some database
> value within the same time)? How good is mysql's locking in that constellation?
no
Locking doesn't work with this, because server 1 doesn't know what server 2 does (locks)
and
vice versa. And what shall the poor reading server do when the writing server just changes
the data ?
Maybe, if you build all aplications round this, to always fully lock a table on both
servers before changing data, might work. But even then, cached data might be a problem.
Why do you want to do this ?
prosit
Klaus
Antworten in Deutsch tun's auch :o)
-----Ursprüngliche Nachricht-----
Von: Oliver Neumann [New Identity AG] [mailto:oliver.neumann@stripped]
Gesendet: Mittwoch, 9. Juni 2004 10:50
An: mysql@stripped
Betreff: MySQL 3.23.40 and 4.0.20 parallely on the same data-source
Hi there,
just one quick question I didn't find an answer in the docu:
Is it possible (stable and without data loss :-)) to run e.g.
mysql-3.23.40 on Port 3306
and
mysql-4.0.20 on Port 3307
on the same machine (SuSE Linux with 2.4.4-kernel) !AND! on
the same data-directory without the two versions conflicting (e.g. when both version would
try to change some database value within the same time)? How good is mysql's locking in
that constellation?
Thanks for your support in advance.
Greetz,
Oliver Neumann
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