-none- 2007-08-15 - By Matthew Zito
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I can't disagree enough with #4. Most of our customers who are the most
successful with RAC do so with a mixed configuration of OCFS2 and ASM. OCFS2
is used for spfiles, password files, an archive log dest, while the ASM
instance holds all of the data. This neatly gets around the limitations of
OCFS from a volume management perspective, gets rid of the need for raw devices
to use for the spfile, and can help mitigate "data black box" concerns about
ASM, as you'll have an additional destination for your archive logs that is not
ASM for backups, recovery, etc.
As far as #5, OCFS2 works with 2.6 kernels...
Thanks,
Matt
--
Matthew Zito
Chief Scientist
GridApp Systems
P: 646-452-4090
mzito@(protected)
http://www.gridapp.com
-- --Original Message-- --
From: oracle-l-bounce@(protected) on behalf of Torsten Rosenwald
Sent: Wed 8/15/2007 4:45 AM
To: lizzpenaorclgrp@(protected)
Cc: oracle-l@(protected)
Subject: AW: Linux RAC using OCFS2 - inital installation questions
Hi Laura,
reading the docs is a very good starting point...;-)
do not forget to download the patches (10.2.0.3.0)
1> it depends on what you are going to use for the 'file system' (ASM or
RAC)
2> No, you should not. establish user equivalence and follow the docs.
3> What you mean is the cluster verification utility (cluvfy.sh), you should
use it.
4> This is the point you should decide which way you want to go: the ASM or
the OCFS2 way, but: do not mix it (due to complexity reasons)
5> OCFS only works witth 2.4 kernels, so this is no choice here, use OCFS2
6> There is no such thing as an ASM flashback recovery area. Maybe there
only has been a misunderstanding;-) You may store your FRA in ASM, but ASM
does not provide one by itself, ok? Archive logging provides a
roll-forward-mechanism, flashback a rollback mechanism. those are very
different things.
hth,
Torsten.
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<P><FONT SIZE=2>I can't disagree enough with #4. Most of our customers
who are the most successful with RAC do so with a mixed configuration of OCFS2
and ASM. OCFS2 is used for spfiles, password files, an archive log dest,
while the ASM instance holds all of the data. This neatly gets around the
limitations of OCFS from a volume management perspective, gets rid of the need
for raw devices to use for the spfile, and can help mitigate "data black
box" concerns about ASM, as you'll have an additional destination for your
archive logs that is not ASM for backups, recovery, etc.<BR>
<BR>
As far as #5, OCFS2 works with 2.6 kernels...<BR>
<BR>
Thanks,<BR>
Matt<BR>
<BR>
--<BR>
Matthew Zito<BR>
Chief Scientist<BR>
GridApp Systems<BR>
P: 646-452-4090<BR>
mzito@(protected)<BR>
<A HREF="http://www.gridapp.com">http://www.gridapp.com</A><BR>
<BR>
<BR>
<BR>
-- --Original Message-- --<BR>
From: oracle-l-bounce@(protected) on behalf of Torsten Rosenwald<BR>
Sent: Wed 8/15/2007 4:45 AM<BR>
To: lizzpenaorclgrp@(protected)<BR>
Cc: oracle-l@(protected)<BR>
Subject: AW: Linux RAC using OCFS2 - inital installation questions<BR>
<BR>
Hi Laura,<BR>
<BR>
reading the docs is a very good starting point...;-)<BR>
do not forget to download the patches (10.2.0.3.0)<BR>
<BR>
1> it depends on what you are going to use for the 'file system' (ASM or<BR>
RAC)<BR>
2> No, you should not. establish user equivalence and follow the docs.<BR>
3> What you mean is the cluster verification utility (cluvfy.sh), you should
<BR>
use it.<BR>
4> This is the point you should decide which way you want to go: the ASM or
<BR>
the OCFS2 way, but: do not mix it (due to complexity reasons)<BR>
5> OCFS only works witth 2.4 kernels, so this is no choice here, use OCFS2
<BR>
6> There is no such thing as an ASM flashback recovery area. Maybe there<BR>
only has been a misunderstanding;-) You may store your FRA in ASM, but ASM<BR>
does not provide one by itself, ok? Archive logging provides a<BR>
roll-forward-mechanism, flashback a rollback mechanism. those are very<BR>
different things.<BR>
<BR>
hth,<BR>
Torsten.<BR>
<BR>
<BR>
</FONT>
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