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 Post subject: What is "DisableChunkletInitUNMAP" ?
PostPosted: Wed Jan 31, 2018 8:36 pm 

Joined: Tue Mar 29, 2016 9:32 pm
Posts: 56
There is a system parameter "DisableChunkletInitUNMAP" .. anyone know what that is ?
Array is an 8440 running :
Code:
cli% showversion
Release version 3.3.1
Patches:  P01,P02,P04,P06,P13,P16


example:
Code:
cli% showsys -param
System parameters from configured settings

-------Parameter--------      ----Value----
RawSpaceAlertFC          :                0
RawSpaceAlertNL          :                0
RawSpaceAlertSSD         :                0
RemoteSyslog             :                0
RemoteSyslogHost         :          0.0.0.0
RemoteSyslogSecurityHost :          0.0.0.0
SparingAlgorithm         :          Default
EventLogSize             :               4M
VVRetentionTimeMax       :        336 Hours
UpgradeNote              :
PortFailoverEnabled      :              yes
AutoExportAfterReboot    :              yes
AllowR5OnNLDrives        :               no
AllowR0                  :               no
ThermalShutdown          :              yes
FailoverMatchedSet       :              yes
SessionTimeout           :         01:00:00
HostDIF                  :              yes
HostDIFTemplate          :    3par_host_dif
AllowWrtbackSingleNode   :                0
AllowWrtbackUpgrade      :                0
DisableDedup             :               no
OverprovRatioLimit       :              0.0
OverprovRatioWarning     :              0.0
DisableChunkletInitUNMAP :               no
PersonaProfile           :       block-only
AllowR5OnFCDrives        :               no
DisableCompr             :               no
RemoteCopyHostThrottling :               no


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 Post subject: Re: What is "DisableChunkletInitUNMAP" ?
PostPosted: Thu Feb 01, 2018 3:11 am 

Joined: Mon Sep 21, 2015 2:11 pm
Posts: 590
I have no idea, but based on the name I would assume that it would prevent chunklets being fully cleared by UNMAP to be reinitialized automatically... However I thought you would need to compact the CPG to clear empty LDs which again cleared chunklets.

But again, this is a wild guess.


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