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

DiWi — Fri, 31 Oct 2014 09:38:15 GMT

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

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

Greybeard — Wed, 12 Nov 2014 11:18:25 GMT

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.

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

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

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