RE: a quick poll regarding the 11gR2 OFA
- From: "Lange, Kevin G" <kevin.lange@xxxxxxxxxx>
- To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 11 May 2010 16:14:26 -0500
When I first went thru this, I took the /u01 thru /u09 not to litterally mean
"use /u01 to /u09". I took it as an example where you replace them with more
meaningfull path names.
So, we started using /oradata01 .... /oradata25 and /oralogs01 ....
/oralogs05 ... etc.
It was not till years later when I found that they actually MEANT for you to
use u01 .... u09.
Oh well.
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Niall Litchfield
Sent: Tuesday, May 11, 2010 4:00 PM
To: frits.hoogland@xxxxxxxxx
Cc: Freek.DHooge@xxxxxxxxx; ORACLE-L
Subject: Re: a quick poll regarding the 11gR2 OFA
On Tue, May 11, 2010 at 8:54 PM, Frits Hoogland <frits.hoogland@xxxxxxxxx>
wrote:
?
Anyone know any history of '/u01'? I guess it was used in the past to
have a second '/usr' on a separate mountpoint, to have a clear place which
holds the database software. If so, /u02 and further for the datafiles and
other database files is really bogus.?
?
The original paper is available at
http://www.method-r.com/downloads/cat_view/38-papers-and-articles?(the author's
current home online) and well worth reading.?I'll just quote the objectives
here, and remember what the typical server config was like in 1990,
specifically relatively few, directly attached, disks on really rather
expensive hardware.
?
Requirement 1. The file system must be
organized so that it is easy to administer
growth from: adding data into
existing databases, adding users, creating
databases, and adding hardware.
?
Requirement 2. It must be possible to distribute
I/O load across sufficiently
many disk drives to prevent a performance
bottleneck.
?
Requirement 3. It may be necessary to
minimize hardware cost.
?
Requirement 4. It may be necessary to
isolate the impact of drive failure across
as few applications as possible.
?
Some of these objectives are well addressed by SAN technology, LVMs and so on.
I think the idea stacks up pretty well. As far as naming goes, well I think you
can tell a mathematically literate individual who understood UNIX?filesystems
of the time?wrote it?:(
?
Name all mount points that will hold sitespecific
data to match the pattern /pm where p is a
string constant chosen not to misrepresent the contents
of any mount point, and m is a unique fixedlength
key that distinguishes one mount point from
another?
?
Unfortunately I'm not entirely convinced that current definers of 10 and
11g?OFA, are quite so rigorous. :(
--
Niall Litchfield
Oracle DBA
http://www.orawin.info
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