Mailing List
Home
MySQL General - General MySQL discussion
MaxDB - Everything about MaxDB, formerly known as SAP DB
MySQL on Win32 - Runing MySQL on Windows 9x/Me/NT/2000/XP
Java Help - Mostly related to the MySQL Connector/J driver
ODBC - ODBC with the MySQL Connector/ODBC driver
Perl - Perl support for MySQL with DBI and DBD::mysql
MySQL++ - Programming with the C++ API to MySQL
Subjects
• mysql openssl Question
• mysql:it 's a db not a dbms how it 's possible?!
• Does the binary log enabling affect the MySQL performances?
• Strange behavior, Table Level Permission
• FULLTEXT query format question
• Preventing Duplicate Entries
• Comparing and writing out BLOBS
• Executing MySQL Commands From Within C Program
• Can 't access mysql after kernel upgrade
• Mysql 4 0 Oracle Stored Procedure Trigger Conversion
• Downgrade Mysql from 4 to 3 23
• MySQL Cluster Software
• mysql test 4 1 fails with the gis test
• ERROR 2002: Can 't connect to local MySQL server through socket
• Getting Identity after INSERT
• Update one field with more fields from another table
• ERROR 1045: Access denied for user: 'root@localhost ' (Using
password: NO)
• mysql have same function mthod as Oracle decode()
 
Search:  
Power your search with and, or, +, -, or "some phrase" operators.
AW: MySQL 3.23.40 and 4.0.20 parallely on the same data-source

AW: MySQL 3.23.40 and 4.0.20 parallely on the same data-source

2004-06-09       - By Franz, Fa. PostDirekt MA

 Back
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@(protected)]
Gesendet: Mittwoch, 9. Juni 2004 10:50
An: mysql@(protected)
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

--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/mysql?unsub=k.franz @(protected)

--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/mysql?unsub=mysql @(protected)