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Changing VMware datastore parameters for a LUN on an MSA2040 (iops=1) ...

 
DiWi
Occasional Contributor

Changing VMware datastore parameters for a LUN on an MSA2040 (iops=1) ...

Hello everybody,

 

according to the best practices for HP MSA2040 storage with VMware vSphere, HP recommends to set the iops Parameter for a LUN to 1 instead of 1000, when using Round Robin as Path Selection Policy.

 

Changing iops=1 with the following command under ESXi 5.5 Update 2 with ...

 

esxcli storage nmp psp roundrobin deviceconfig set --type=iops --iops=1 --device naa.xxxxxxxxxxxxxxxxxxx

 

... results in the following output for a device ...

 

Path Selection Policy Device Config: {policy=iops,iops=1,bytes=10485760, ...}

 

Before setting iops to 1, the output was {policy=rr,iops=1000, ...}

 

Now, after setting iops to 1, the output is {policy=iops,iops=1, ...}

 

Do I make mistakes with the esxcli command or is the policy name always changed from 'rr' to 'iops' ???

 

Furthermore, I would like to know, if the iops setting can be changed on a LUN, which has VM directories with running VM's ??? Is a restart necessary to make the changes effective?

 

Regards,

DiWi

 

1 REPLY 1
Greybeard
Esteemed Contributor

Re: Changing VMware datastore parameters for a LUN on an MSA2040 (iops=1) ...

well not a VM expert but from the command you listed I would guess it reset to the specified =iops, try with both rr and iops in the command string to set both parameters.

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