Controlling LUN queue depth throttling in VMware ESX / ESXi (1008113) with EVA4400

[Pazzoide1976]

Hi,

I have a question about the kb Controlling LUN queue depth throttling in VMware ESX / ESXi (1008113).

I have to change these parameters on a HP EVA4400 storage because I found in vmkernel many messages of this type:

Analyzing the vmkernel.log host s1

2014-12-02T04: 03: 24.178Z CPU3: 1.33054 million) NMP: nmp_ThrottleLogForDevice: 2319: Cmd 0x2a (0x412401e1e0c0, 2951955) to dev "naa.6001438005df75c20000500004dd0000" on path "vmhba3: C0: T0: L17" Failed: H: 0x0 D: 0x28 P: 0x0 Possible sense data: 0x0 0x0 0x0. Act: NONE

2014-12-02T04: 03: 24.184Z CPU3: 2951958) NMP: nmp_ThrottleLogForDevice: 2319: Cmd 0x2a (0x412401e82080, 1330588) to dev "naa.6001438005df75c20000500005820000" on path "vmhba2: C0: T0: L13" Failed: H: 0x0 D: 0x28 P: 0x0 Possible sense data: 0x0 0x0 0x0. Act: NONE

2014-12-02T04: 03: 24.188Z cpu5: 1257171) NMP: nmp_ThrottleLogForDevice: 2319: Cmd 0x2a (0x4124401d0f80, 1.27284 million) to dev "naa.6001438005df75c200005000018a0000" on path "vmhba3: C0: T0: L21" Failed: H: 0x0 D: 0x28 P: 0x0 Possible sense data: 0x0 0x0 0x0. Act: NONE

2014-12-02T04: 03: 24.189Z cpu1: 1330592) ScsiDeviceIO: 2318: Cmd (0x4124001dbac0) 0x2a, CmdSN 0x8000002d world from 1,330,537 to dev "naa.6001438005df75c20000500005820000" failed H: 0x0 D: 0x28 P: 0x0 Possible sense data: 0x0 0x0 0x0.

Looking in HP I found this article

http://h20564.www2.hp.com/hpsc/doc/public/display?sp4ts.oid=3664583&calledBy=&docId=emr_na-c02697105-1&docLocale

I would like to know if these parameters can be changed with the virtual machines running or whether it is better to put the hosts in maintenace mode.

Thank You

Greetings

P.S. This thread has been moved from General to Storage Area Networks (SAN) (Enterprise). - Hp Forum Moderator

[Zsal]

The Queue Depth settings take effect immediately. You do not need to reboot the ESX/ESXi host. Hence, ideally virtual machines can be running while you implement the changes.

Hope this helps!!

Regards

Zsal