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Duplication count greater than expected


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Hi there,

Doing some maintenance of my folders today, I checked the duplication count of one of them.

Strangely, dpcmd told me that the actual duplication number is greater than what I configured:

D:\Applications>dpcmd get-duplication Drivers

Found 'Drivers'

  Expected number of copies: 2
  Found number of copies: 3
  Is directory: True
  Has multiple sub-duplication counts: False

  - \Device\HarddiskVolume12\PoolPart.81f030f2-2871-42ff-a4a9-3b7c96ed41f4\Applications\Drivers
  - \Device\HarddiskVolume4\PoolPart.60599e22-1e43-4c69-ae7e-4ed4c09af05e\Applications\Drivers
  - \Device\HarddiskVolume9\PoolPart.9172bfeb-6f11-448e-b90a-55627c6b31bf\Applications\Drivers

Could someone explain that? Is there a way to make DP perform some cleanup?

 

Edit: checking other folders, it gets even worst:

D:\Applications>dpcmd  get-duplication Games

Found 'Games'

  Expected number of copies: 1
  Found number of copies: 4
  Is directory: True
  Has multiple sub-duplication counts: False

  - \Device\HarddiskVolume12\PoolPart.81f030f2-2871-42ff-a4a9-3b7c96ed41f4\Applications\Games
  - \Device\HarddiskVolume1\PoolPart.e69774f6-a237-4849-b673-9349b2016df1\Applications\Games
  - \Device\HarddiskVolume4\PoolPart.60599e22-1e43-4c69-ae7e-4ed4c09af05e\Applications\Games
  - \Device\HarddiskVolume9\PoolPart.9172bfeb-6f11-448e-b90a-55627c6b31bf\Applications\Games


D:\Applications>dpcmd  get-duplication "Operating Systems"

Found 'Operating Systems'

  Expected number of copies: 1
  Found number of copies: 2
  Is directory: True
  Has multiple sub-duplication counts: False

  - \Device\HarddiskVolume12\PoolPart.81f030f2-2871-42ff-a4a9-3b7c96ed41f4\Applications\Operating Systems
  - \Device\HarddiskVolume4\PoolPart.60599e22-1e43-4c69-ae7e-4ed4c09af05e\Applications\Operating Systems


D:\Applications>dpcmd  get-duplication Tools

Found 'Tools'

  Expected number of copies: 1
  Found number of copies: 2
  Is directory: True
  Has multiple sub-duplication counts: False

  - \Device\HarddiskVolume12\PoolPart.81f030f2-2871-42ff-a4a9-3b7c96ed41f4\Applications\Tools
  - \Device\HarddiskVolume4\PoolPart.60599e22-1e43-4c69-ae7e-4ed4c09af05e\Applications\Tools
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3 answers to this question

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It's only the directory entries that occur in many duplicates and not the files within them.

 

Example setup:

 

+Pool of 3 drives.

+Folder X has a duplication count of 2x and contains 5 files. (10 files in total across 3 drives)

 

If the folder is then balanced across the 3 drives Folder X will exist in three copies because there will be files belonging to that folder stored on all drives

(For example drive A with 3 files, Drive B with 4 files and Drive C with 3 files)

 

So getting the duplication count on folders is a bit misleading. You should look at individual files instead.

 

Hope this clears it out :)

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