eng_wesam
1 Copper

own default processor of luns

Hi,

when I create LUN on my storage system cx4-120 clariion,I notice that automatically it has default own processor (SP A or SP B).
Based on what happens this choice?

thanks,


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7 Replies
dynamox
6 Thallium

Re: own default processor of luns

it's round robin, if you were to create 4, 2 would be placed on SPA and 2 on SPB

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eng_wesam
1 Copper

Re: own default processor of luns

thank you for answer,

the meaning of your words that may be lun 2,4 placed on SP A or on SP B or one of them placed on SP A and ather on SP B or vice versa that is you mean??
and who do this round robin? is it FLARE OS?

thanks

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dynamox
6 Thallium

Re: own default processor of luns

FLARE OS makes that decision where to assign the LUNs.

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eng_wesam
1 Copper

Re: own default processor of luns

again thanks for your answer

the meaning of your words that may be lun 2,4 placed on SP A or on SP B or one of them placed on SP A and ather on SP B or vice versa that is you mean??


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dynamox
6 Thallium

Re: own default processor of luns

if you create 4 LUNs, the system will place 2 on SPA and 2 on SPB.

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eng_wesam
1 Copper

Re: own default processor of luns

But in my storage system I created 18 LUNs, 6 of them placed on SP A and 12 placed on SP B.

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911911
1 Copper

Re: own default processor of luns

You basically have 2 options, manually select which SP you want to assign to a LUN, or you let the System make that decision for you. The system has a huge number of undocumented algorithms that will decide which luns goes to which SP. The aim is to make it as load balanced as possible.

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