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Oracle UDP protocol or Veritas LLT for interconnect traffic?

Bill Cullen EXPERT RESPONSE FROM: Bill Cullen

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QUESTION POSED ON: 05 April 2007

If you had Veritas SFORAC 4.1 MP1 and were running Oracle 10g, would you use Veritas LLT protocol for interconnect traffic or Oracle's prefered UDP protocol?

Oracle tells us that no one uses LLT, but Veritas says that they don't certify RAC over UDP.


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EXPERT RESPONSE

Well, despite Oracle's claims to you, I know for sure you aren't the only shop using LLT <raises hand>.

If I had something that was working and was supported by Oracle, I would be hesitant to switch to something else without a persuasive business case. I understand Oracle does its development and testing on UDP, and I know some are worried about their support division blaming unrelated problems on the use of LLT when working TARs, but there are also many people who swear that LLT's reduced overhead and lower latency is vital to their configurations.

I am a fan of Veritas, and assuming this is a working configuration I would not change a thing unless forced to through a desupport notification or the like. If I were designing a new system and could not make a business case for the requirement of Veritas's Storage Foundation, I would give significant weight to Oracle's desired transport protocols when architecting the initial design.

I hope this helps.

Bill


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