RAC Re: Interconnect
- From: "Hameed, Amir" <Amir.Hameed@xxxxxxxxx>
- To: "Alex Gorbachev" <gorbyx@xxxxxxxxx>
- Date: Fri, 24 Nov 2006 22:16:33 -0500
Oracle is not keen on VERITAS because of the obvious reason; it wants
people to use ONLY those products that it offers; Larry's Hat is the
latest example. I used DBE/AC for 9i RAC extensively for over 1.5 years.
We had a three-node RAC environment supporting the multi-tier 11i
(11.5.9) architecture on three Sunfire 15k domains, using four giga-bit
interconnects, etc.The environment was a copy of production; it was a
pretty large and complex environment. We ran full-blown production loads
against the environment when testing RAC using load-runner for several
months. We did not experience any issues with LLT. The shipping and
receiving times of buffers from the statspack report never indicated any
issues. I would like to mention here that our performance consultant for
this project was Steve Adams. As for the support, you will find all
sorts of people in support. I have seen some very lousy support from
Oracle at times and when the issue got escalated to the right person,
the support was excellent. Same goes for VERITAS, Sun, EMC, etc. We know
the right folks at VERITAS and we engage them directly through our
account manager.
-----Original Message-----
From: Alex Gorbachev [mailto:gorbyx@xxxxxxxxx]
Sent: Friday, November 24, 2006 9:20 PM
To: Hameed, Amir
Cc: K Gopalakrishnan; panandrao@xxxxxxxxx; ax.mount@xxxxxxxxx; Oracle-l
List; racdba@xxxxxxxxxxxxx
Subject: Re: RAC Interconnect
Veritas support - well it varies. At the site I used to work, we've got
down to backline engineering and there are really brilliant technical
people working. However, particularly sluggish is support for Oracle 10g
and Oracle itself is not very keen on Veritas to say the least. IMHO.
Regarding LLT,
I tested LLT in another aspect - evaluating CPU consumption compare to
UDP (running Oracle of course). Surprisingly, it wasn't any lower with
LLT whereas I thought that eliminating "expensive" IP stack should
definitely reduce CPU consumption.
On 11/24/06, Hameed, Amir <Amir.Hameed@xxxxxxxxx> wrote:
> Gopal,
> We have a very close relationship with VOS and I have always found the
> Veritas side of VOS extremely competent and technically very sound. We
> are not currently running RAC (and there is a long story behind it)
> but if we run into any issues with LLT in the future, I have good
> faith that Veritas will resolve the issue for us.
--
Best regards,
Alex Gorbachev
The Pythian Group
Sr. Oracle DBA
http://www.pythian.com/blogs/author/alex/
http://blog.oracloid.com
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