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Ramdisk Size

  1. Clients

File Size

  1. Minimum Files

#Maximum Files

File System Overhead

1024 MB

1

120 MB

7

7

64 MB

1024 MB

2

108 MB

4

4

52 MB

 

 

 

 

 

 

2048 MB

1

124 MB

15

15

64 MB

2048 MB

2

117 MB

8

8

59 MB

2048 MB

3

105 MB

6

6

53 MB

2048 MB

4

117 MB

4

4

59 MB

 

 

 

 

 

 

4096 MB

1

252 MB

15

15

64 MB

4096 MB

2

237 MB

8

8

67 MB

4096 MB

3

212 MB

6

6

68 MB

4096 MB

4

237 MB

4

4

67 MB

 

 

 

 

 

 

6144 MB

1

380 MB

15

15

64 MB

6144 MB

2

357 MB

8

8

75 MB

6144 MB

3

320 MB

6

6

64 MB

6144 MB

4

357 MB

4

4

75 MB

 

 

 

 

 

 

8192 MB

1

261 MB

30

30

101 MB

8192 MB

2

245 MB

16

16

107 MB

8192 MB

3

219 MB

12

12

89 MB

8192 MB

4

245 MB

8

8

107 MB

8192 MB

5

261 MB

6

6

101 MB

8192 MB

6

219 MB

6

6

89 MB

 

 

Notes

  • The available back buffer is Min Files * File Size.
  • The available pause buffer is Max Files * File Size (Assuming diskspace is available) .
  • When the paused buffer exceeds the difference between Max - Min then you will start to lose your back buffer.
  • The maximum number of files can be any number up to ( [Disk Space] - [Filesize] - Overhead  ) / [Fizesize], however if the max number of files is increased and the minimum number of files fully utilizes all the available space, then it is possible for a paused client to use more than its fair share of buffer, which would limit the potential buffer size of the other clients.
  • Suggested values aims to have an overhead of at least 50 MB or 1% of ramdrive size to cover system files.
  • In the table above we set the Minimum file number to utilise all of the ramdisk. This means that all clients have the maximum possible back buffer for timeshifiting and all clients can achieve this buffer if simultaneously timeshifting.
  • In the table above we set the Maximum file number to the same number as the minimum file number. This means that a prolonged paused client would not reduce the available buffer for the other clients.
  • Here is a forum thread discussing timeshift buffers and ramdrives with some examples and further explanations.

Constraints

  • [Disk Size] - [Filesize] - Overhead >= [Filesize] * [#Minimum files] * [#Clients]
  • [Disk Size] - [Filesize] - Overhead >= [Filesize] * [#Maximum files]

   

 

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