Can I install and run two versions of CUBRID on the same machine?

Yes you can. You have to configure the following parameters:

1. cubrid.conf
1. cubrid_port_id
2. ha_port_id (if you're using High Availability)
2. cubrid_broker.conf
1. MASTER_SHM_ID
2. BROKER_PORT
3. APPL_SERVER_SHM_ID

If you're using different CUBRID versions, you have to run each of them with the following environment variables:

• $CUBRID = the path to where CUBRID is installed (ex: C:\CUBRID or /home/ginarrbrik/CUBRID)
• $CUBRID_DATABASES = the path to where the databases.txt file resides (ex: C:\CUBRID\databases or /home/ginarrbrik/CUBRID/databases)
• $CUBRID_LANG=ex: en_US
• On linux systems you also have to append $CUBRID/lib to $LD_LIBRARY_PATH (different one for each instance).

For example:

[ginarrbrik@cubrid ~]$ export CUBRID=/home/ginarrbrik/CUBRID841
[ginarrbrik@cubrid ~]$ export CUBRID_DATABASES=$CUBRID/databases
[ginarrbrik@cubrid ~]$ export CUBRID_LANG=en_US
[ginarrbrik@cubrid ~]$ export LD_LIBRARY_PATH=$CUBRID/lib:$LD_LIBRARY_PATH
[ginarrbrik@cubrid ~]$ cubrid service start

@ cubrid master start
++ cubrid master start: success
@ cubrid broker start
++ cubrid broker start: success
[ginarrbrik@cubrid ~]$