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Malpaso1
1 Copper

Determinng ITL count in Invista

We are running Invista in a very large environment and are hitting the max ITL count all over the place.

There is no simple way to provide a report from Element Manager that shows this so that we can plan properly

Does anyone have a script or tool that they have that can provide this?

Much appreciated

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4 Replies
Ayman_Talkhan
2 Bronze

Re: Determinng ITL count in Invista

Hello,

I'm not entirely sure if this is what you're looking for but I have found a primus emc165669 which relates to this issue, in case you are unable to view the primus solution kindly check below:

Note:

Each HBA port WWN is counted as an I (Initiator)
Each Virtual Target Port WWN is counted as a T (Target)

Equation:

  • The number of ITLs on the SSM = (Number of DVT LUNs)
                                                           + (Number of LUNs on AVT1) * (Number of Initiators logging into AVT1)
                                                           + (Number of LUNs on AVT2) * (Number of Initiators logging into AVT2)
                                                           ...
                                                           + (Number of LUNs on AVTn) * (Number of Initiators logging into AVTn)

  • The Data Virtual Target (DVT) LUNs can be viewed by running:

          switch# show santap module 2 dvtlun brief
          switch# show santap module 2 dvtlun brief | count
       

  • The Appliance Virtual Target (AVT) LUNs can be viewed by running:

          switch# show santap module 2 avtlun brief
          switch# show santap module 2 avtlun brief | count

  • The number of ITLs of the SSM can be found by running:

          switch# attach mod 2
          module#show isapi dpp all queue | include LUN | count

  • There are eight Data Path Processors (DPP) on a SSM.

  • The ITL list and count for a DPP can be found by running:

          module#show isapi dpp 1 queue            
          module#show isapi dpp 1 queue | include LUN | count      
          module#show isapi dpp 2 queue            
          module#show isapi dpp 2 queue | include LUN | count
          module#show isapi dpp 3 queue            
          module#show isapi dpp 3 queue | include LUN | count
          module#show isapi dpp 4 queue            
          module#show isapi dpp 4 queue | include LUN | count
          module#show isapi dpp 5 queue            
          module#show isapi dpp 5 queue | include LUN | count
          module#show isapi dpp 6 queue            
          module#show isapi dpp 6 queue | include LUN | count
          module#show isapi dpp 7 queue            
          module#show isapi dpp 7 queue | include LUN | count
          module#show isapi dpp 8 queue            
          module#show isapi dpp 8 queue | include LUN | count
          module#exit

  • The maximum number of ITLs per DPP varies in all SSI releases:
    • The maximum number of ITLs per SSM in 3.0.2j SSI is 1024.
    • The maximum number of ITLs per SSM in 3.1.2k SSI is 2048.
    • The maximum number of ITLs per SSM in 3.1.3 SSI is 4080

I hope this answers your question.

If not please let me know

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Malpaso1
1 Copper

Re: Determinng ITL count in Invista

Thanks Ayman

I appreciate it

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Malpaso1
1 Copper

Re: Determinng ITL count in Invista

Hello Ayman

Can you tell me if I need to run these commands from the DPC?

I have logged in to the DPC and the commands are not available.

Thanks again

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Ayman_Talkhan
2 Bronze

Re: Determinng ITL count in Invista

Hello Malpaso,

I entered the commands above through CLI on the switch itself (i am not entirely sure what you mean by DPC).

I apologize for the inconvenience.

Regards,

Ayman

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