Contributor
Contributor

Path Policy Change

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I have a LUN with MRU policy.

So what happens if I change path selection policy to fixed and indicate another path as the preferred path.

Is there any potential risk or downtime to my storage connectivity (like packet drop...)

Thank in advance

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Commander
Commander

Hi ,

Ideally you should not see any issues while changing path selection policy of lun. However I would prefer to do it when the VM are not running on that ESXI host.

Regards

Mohammed

Mohammed Emaad |VCP 3, 4,5 |VCP -NV 6 | VCP-DT 51 | vCAP4-DCA | VCAP5DCA | | Mark it as helpful or correct if my suggestion is useful.

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6 Replies
Commander
Commander

Hi ,

Ideally you should not see any issues while changing path selection policy of lun. However I would prefer to do it when the VM are not running on that ESXI host.

Regards

Mohammed

Mohammed Emaad |VCP 3, 4,5 |VCP -NV 6 | VCP-DT 51 | vCAP4-DCA | VCAP5DCA | | Mark it as helpful or correct if my suggestion is useful.

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Enthusiast
Enthusiast

As suggested, you can perform the same in off-peak time. Also please ensure you are considering your environment (ESX version, storage model, fail-over policy used in storage etc...) before making the changes.

Contributor
Contributor

Thank Mohammed, Vipinvk

Assume that I have two paths, path1 from HBA1 and path2 from HBA2. Path selection policy is MRU and path1 is using. So if I change to Fixed policy and set path2 as preferred path, all FC traffic will go to path2 without data corruption?

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Commander
Commander

Hi,

That's correct.

Regards

Mohammed

Mohammed Emaad |VCP 3, 4,5 |VCP -NV 6 | VCP-DT 51 | vCAP4-DCA | VCAP5DCA | | Mark it as helpful or correct if my suggestion is useful.
Contributor
Contributor

Thank you so much Smiley Happy

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Commander
Commander

Hi ,

Again let me say it, if  you have high I/O VM, do not change the path when the VM is running on ESXi host.

Regards

Mohammed

Mohammed Emaad |VCP 3, 4,5 |VCP -NV 6 | VCP-DT 51 | vCAP4-DCA | VCAP5DCA | | Mark it as helpful or correct if my suggestion is useful.
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