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Just curious, now Oracle 11g installs by default in folder C:\app\

Why? Before, Oracle was installed by default in folder C:\oracle... Why now is created "app" folder?

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2 Answers

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I think the reason is to harmonize the unix and windows file system structure. On Windows the structure is /<mountpoint>/app/<username>. On Windows it is <DRIVELETTER>:\app\<username>. <mountpoint> is a directory name (Oracle prefers u01,u02,...), <DRIVELETTER> is C, D ... and <username> is the username of the Oracle software owner. The reason for /<mountpoint>/app/<username> is that Oracle assumes the unix home directory in something like <mountpoint>/home/<username>. Then all the base directories of the oracle user have the structure /*/*/oracle. Choosing <DRIVELETTER>:\app\<username> (or /<mountpoint>/app/<username>) instead of <DRIVELETTER>:\<username> also avoids potentially naming conflicts. In contrast to <DRIVELETTER>:\app the directory <DRIVELETTER>:\ does not contain only directories that equals usernames.

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Why is this incoherent brain dump the accepted answer? – Phil Oct 31 '12 at 0:03
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This is explained in the documentation, here. See "B.2 Changes to the Optimal Flexible Architecture for Oracle Database".

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Sorry, but on that document I don't find a reason why switching from C:\oracle to C:\app\<username>. It just states that from now on it will be so. – user316687 Oct 29 '12 at 18:50
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Why do Oracle, who actually write the software, need a reason to change paths for software installation? I don't mean to be rude, but your question and reply to my answer is more pointless than the reason Oracle changed their directory structure. – Phil Oct 29 '12 at 21:21

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