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orbital2

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orbital2

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October 26th, 2011 06:00

Execution throttle and Queue Depth

HI,

Just a quick question. Should these be set to the same?

We have 8 hosts, 2 paths to each SP, therefore the execution throttle should be set to 100. The QD on say my ESX servers are set to 32, shall i make the ET 32 as well?

thanks in advance

  • K

    kelleg

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    Posted October 26th, 2011 12:00

    See Knowledgebase article on PowerLink emc274169. This may help answer your question.

    glen

  • O

    orbital2

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    Posted November 21st, 2011 02:00

    Hi,

    thanks for the reply.

    This document says Q = queue depth or execution throttle, i thought they werew completely different settings. Isnt excution throttle a HBA setting, therefore if every LUN on the server sends IO then its limited at the HBA setting rather than a individual LUN just being limited with that VMware setting.

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    kelleg

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    Posted November 25th, 2011 12:00

    THe Execution Throttle is an HBA setting and Queue Depth is an operating system setting. The article is more for the Qlogic HBA's and what execution throttle should be. ESX is set to a default of 32 for ET - you should leave this as it is. I'm not sure about QD - probably should leave that as it's set.

    glen

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