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 Post subject: 3par 8400 and CPG space. please assist.
PostPosted: Fri Dec 17, 2021 4:02 pm 

Joined: Fri Dec 17, 2021 3:50 pm
Posts: 1
I am moving a HPE 3par 8400 from some VMFS 5 volumes connected to some vSphere 6.7 hosts to vvols.

Right away I ran into capacity errors, even though the storage container looked to be only using 2.8TB or so at the time.

Capacity Efficiency ( from storage containers view )
82% Savings
Savings 12,719.25 GiB
Used 2,856.25 GiB
Usable 15,575.50 GiB
5.9:1 Overall compaction
11.3:1 Dedup ratio
7,182.60 GiB Dedup savings


I created a VV with the fc drive r5 drive type so I could move some workloads to that disk type.

when I do a showsys -space I am seeing a bunch of shared space. and I am wondering why?


when I review documentation I don't see this shared space at all...


see below.

------------ System Capacity (MiB) -------------
Total Capacity : 56729600
Allocated : 44213248
Legacy Volumes : 0
User : 0
Snapshot : 0
CPGs (TPVVs & TDVVs & CPVVs) : 32755712
Shared : 18014020
Private : 14677008
Base : 14675300
Reserved : 10816276
Reserved (vSphere VVols) : 3859024
Snap : 1708
Reserved : 1708
Reserved (vSphere VVols) : 0
Free : 64684
Unmapped : 0
System : 11457536
Internal : 367616
Admin : 337920
Spare : 10752000
Used : 0
Unused : 10752000
Free : 12513280
Initialized : 12513280
Uninitialized : 0
Unavailable : 0
Failed : 3072
------------------ Efficiency ------------------
Compaction : 1.53
Dedup : 1.08
Compression : -
Data Reduction : 1.08
Overprovisioning : 0.66



now FC vs SSD

showsys -space -devtype FC
------------ System Capacity (MiB) -------------
Total Capacity : 27443200
Allocated : 15336448
Legacy Volumes : 0
User : 0
Snapshot : 0
CPGs (TPVVs & TDVVs & CPVVs) : 11440128
Shared : 0
Private : 11374420
Base : 11373736
Reserved : 10498608
Reserved (vSphere VVols) : 875128
Snap : 684
Reserved : 684
Reserved (vSphere VVols) : 0
Free : 65708
Unmapped : 0
System : 3896320
Internal : 367616
Admin : 98304
Spare : 3430400
Used : 0
Unused : 3430400
Free : 12103680
Initialized : 12103680
Uninitialized : 0
Unavailable : 0
Failed : 3072
------------------ Efficiency ------------------
Compaction : 1.50
Dedup : -
Compression : -
Data Reduction : -
Overprovisioning : 0.65


showsys -space -devtype SSD
------------ System Capacity (MiB) -------------
Total Capacity : 29286400
Allocated : 29220864
Legacy Volumes : 0
User : 0
Snapshot : 0
CPGs (TPVVs & TDVVs & CPVVs) : 21659648
Shared : 18014020
Private : 3630268
Base : 3629244
Reserved : 645348
Reserved (vSphere VVols) : 2983896
Snap : 1024
Reserved : 1024
Reserved (vSphere VVols) : 0
Free : 15360
Unmapped : 0
System : 7561216
Internal : 0
Admin : 239616
Spare : 7321600
Used : 0
Unused : 7321600
Free : 65536
Initialized : 65536
Uninitialized : 0
Unavailable : 0
Failed : 0
------------------ Efficiency ------------------
Compaction : 1.52
Dedup : 1.08
Compression : -
Data Reduction : 1.08
Overprovisioning : 0.67


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 Post subject: Re: 3par 8400 and CPG space. please assist.
PostPosted: Sat Dec 18, 2021 2:55 am 

Joined: Mon Sep 21, 2015 2:11 pm
Posts: 1347
Location: Europe
I’m pretty sure that shared capacity in SSD tier is the dedupe store (DDS).

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