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DB2 doesn’t have any defaults for filesystems because that is an OS-level thing. However, there are a few sanity checks and some recommeded separation when installing DB2 on Linux and UNIX operating systems. These are my best practices for installations, in general terms.

Jan 24, 2007 - We encourage you to read our updated PRIVACY POLICY and COOKIE POLICY. (You can read a good intro on db2 backup and restore at. HOT ONLINE BACKUP DB2 - Backs up specified databases from a DB2 instance. Smiler to AT in windows) in UNIX is very straightforward as well. A backup of your DB2 database and related stored data should be created to prevent data loss in the event of a database service outage. The default behavior for a snapshot backup is a full database offline backup of all paths that make up the database. The name of the executable script capable of performing a snapshot backup operation.

Software Location The default location for installing the DB2 code in /opt/ibm/db2/V10.5 (replacing V10.5 with whatever version). Yes, I typed that from memory without having to look it up. The default location works fine, though I would recommend that /opt is mounted as its own filesystem and not just part of root.

There are reasons to put the code in other places, but I wouldn’t unless you have a technical reason to do so. If you’re using db2_install (my favorite installation method), it will prompt you for the install location. Don’t Create Instances in / or in /home After software installation, the next location that DB2 uses is the home directory of the instance owner. Before creating the DB2 instance (either using db2setup or using db2icrt), you need to verify the primary group and the home directory of the DB2 instance owner. DO NOT place the home directory of the db2 instance owner on / or /home. The reasoning for this is because those locations may quite easily be filled up by other users on the server, and if the instance home fills up, DB2 becomes unusable.

We don’t want a random user transferring a giant file and crashing the database. The home directory of the DB2 instance owner cannot easily be changed after instance creation. Other Recommended Filesystems For a minimal usage system, I can live with only two filesystems as described above – /opt and some filesystem for the home directory of the DB2 instance owner. But if I’m setting up a production system to the best reasonable design, I also include separate filesystems for at least the following. Two Data Filesystems I place the database home directory in a data filesystem. I like to have two just because it makes sense to me to start with two, even if they are both part of the same storage group.