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Size of Application/Backup and Data Written Terminology Understanding

D
Byte
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Hi there,

I would like to understand what is the diferrence between Size of Application, Size of Backup and Data Written.

Below there is my understanding so far, please make me correct if I am wrong.

 

Size of Backup - Total size of data that should be backed up (including Index files)

Data Written - Total size of data physically stored to the library/disk

Size of Application - found this definition “The original size of the data before compression”, then what is the difference between Size of Backup and Size of Application?

 

I would be grateful for your ideas.

 

Best answer by Mike Struening RETIRED

Hey @drPhil !

Here’s a quick summary:

  • Size of Application is the scanned size of what we need to backup (before any dedupe, compression, etc.)  Basically Front end Terabytes.
  • Size of backup is what we need to actually back up including metadata
  • Data Written is how much is actually on media (so dedupe and compression factored in)

Let me know if that clarifies!

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6 replies

Mike Struening
Vaulter
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Hey @drPhil !

Here’s a quick summary:

  • Size of Application is the scanned size of what we need to backup (before any dedupe, compression, etc.)  Basically Front end Terabytes.
  • Size of backup is what we need to actually back up including metadata
  • Data Written is how much is actually on media (so dedupe and compression factored in)

Let me know if that clarifies!

https://www.linkedin.com/in/michael-struening
Onno van den Berg
antonio
dude
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D
Byte
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  • drPhil
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  • Byte
  • 110 replies
  • May 27, 2021
Mike Struening wrote:

Hey @drPhil !

Here’s a quick summary:

  • Size of Application is the scanned size of what we need to backup (before any dedupe, compression, etc.)  Basically Front end Terabytes.
  • Size of backup is what we need to actually back up including metadata
  • Data Written is how much is actually on media (so dedupe and compression factored in)

Let me know if that clarifies!


Hi @Mike Struening, thanks for giving an explanation!

Mike Struening
K
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Mike Struening
Vaulter
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Anytime!

https://www.linkedin.com/in/michael-struening
Mike Struening
Vaulter
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As promised, replies for @Kamil W ‘s issue are moved to their own thread for better tracking:

 

https://www.linkedin.com/in/michael-struening
K
Bit
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  • Korey
  • Bit
  • 2 replies
  • November 14, 2022
Mike Struening wrote:

Hey @drPhil !

Here’s a quick summary:

  • Size of Application is the scanned size of what we need to backup (before any dedupe, compression, etc.)  Basically Front end Terabytes.
  • Size of backup is what we need to actually back up including metadata
  • Data Written is how much is actually on media (so dedupe and compression factored in)

Let me know if that clarifies!

thanks Mike!

Mike Struening
1 person likes this
  • Mike Struening
    Mike Struening
K
Byte
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  • Kavya
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  • 14 replies
  • March 17, 2023

How do I retrieve “Size of backup” of every client or Client group?

C
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    Commvault Engineer

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