What is "active unoptimized" Group State?

[TakeshitaEMC]

Hi, all

I want to understand "Group State : active unoptimized".

But I can not see an explanation on CLI manual.

[FYI]

It state can see "esxcli storage nmp path list" command.

fc.20140030130f4101:20040030130f4101-fc.50060160c720063b:5006016b4720063b-naa.600601601b502e00cce7e553fcebe111:
   Runtime Name: vmhba2:C0:T5:L101
   Device: naa.600601601b502e00cce7e553fcebe111
   Device Display Name: DGC Fibre Channel Disk (naa.600601601b502e00cce7e553fcebe111)
   Group State: active unoptimized <-----Here!!!!!
   Array Priority: 0
   Storage Array Type Path Config: {TPG_id=2,TPG_state=ANO,RTP_id=16,RTP_health=UP}
   Path Selection Policy Path Config: {current: no; preferred: no}

Thanks

[vGuy · Accepted solution]

The active unoptimized is the path to the LUN which is not owned by the storage processor. This situation occurs on Arrays which are Asymmetric Active-Active, for example: HP EVAs. ESX from version 4 onwards is ALUA aware thus differentiating between optimized and unoptimized paths.

Optimized paths: are the paths to the Storage Processor which owns the LUN.

Unoptimized paths: are the paths to the Storage Processor which does not own the LUN. And has a connection to the LUN via interconnect between the processors.

There is lot of detailed documentation on this topic on the web, for example:

http://www.yellow-bricks.com/2009/09/29/whats-that-alua-exactly/

http://frankdenneman.nl/storage/esx4-alua-and-hp-continuous-access/

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=102203...

..hth!

[TakeshitaEMC]

Thank you for response.

These URL is very helpful for me ;-]

Thanks

Taro