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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hello
All,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>We’re
considering ASM with Oracle Clusterware 10.2.0.4 as a replacement to OCFS2 in
order to maintain a more reliable RAC. We’ve been hitting stability
issues with our 2 node RAC running IA64 SLES9 SP3 and Oracle 10.1 and OCFS2
1.2.1 – As the upgrade options are limited, ASM seems to be a better
alternative and been recommended by Oracle support as well.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I’ve
got a couple of questions and would appreciate your thoughts:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
primary RAC is hosting 5 databases with around 500 GB divided into a few disk
groups with RAID 6 hosted in two SANs; these disk groups are composed of disks
of 36GB with 15K RPM and 146GB with 10K RPM. I’d like to know if we need
to break the RAID6. If so, what is the best recommended RAID type? <o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>We’ve
got consistent shared LUN listing across the cluster, an example is /dev/mapper/2003013840ad20008
(we’re using this method to create and mount OCFS2 volumes); is it possible
to maintain the same way of discovery? There is a note in “Configuring
Oracle ASMLib on Multipath Disks” saying that <tt><span style='font-family:
"Arial","sans-serif"'>dm</span></tt> prefix must be used for the scan order and
exclude. Do we still need ASMLib, and can we use the device mapper instead of
dm prefix?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks,
and looking forward to hearing from you<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Best
regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Karim
Alkhayer<o:p></o:p></span></p>
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