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File allocation system with minimized reallocation for multimedia home server

2012-5-15

Hironori Sakakihara

TA 8 Technical Secretary

100/AGS483

May 15 2012May 15 20122

Observations today

Users need to deal with a large number of digital content which is saved on various media without order.

The methods to manage digital content without stress are required.

Stress free content management

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Home server conceptual model

TA 8 Conceptual model

File allocation system

with minimized

reallocation

Search and

identify content

Visualization as

digital library

First step

Second step

Third step

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Background Hard disk drive, optical disk drive and flash drive are

becoming a primary storage media in home. Recorders and TV sets with hard disk drive have been

spreading through the market. With removable media, users want to consume digital

content which is saved in other rooms.

library

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Users utilize various digital content. Difference in file size

e-books photos music movies …

When the existing content is deleted from storage media, new regions of free space are created on it.

Background (continued)

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Problems With iteration of addition/deletion, data may be divided into

separated regions when it is stored.

Data1

Data1

Dat

a1D

ata3

Data4

Data4

Data4

Data4

Data4Data4

• Fragmentation reduces storage capacity and system performance.

• Cleaning up the fragmented files takes a lot of time.

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How to resolve the problem

Assuming that the region of the size 0101 is required, the sector number #1 is allocated.

Please see NP for details.

Cluster (size=1000)

#1 (size=1000)

#2 (size=0100) #3(size=0100)

#4 (size=0010) #5 #6 (size=0010) #7

#8 (size=0001)

#9 #10 #11 #12(size= 0001)

#13 #14 #15

#1 (size=1000)

#2 (size=0100) #3(size=0100)

#4 (size=0010) #5 #6 (size=0010) #7

#8 (size=0001)

#9 #10 #11 #12(size= 0001)

#13 #14 #15

#1 (size=1000)

#2 (size=0100) #3(size=0100)

#4 (size=0010) #5 #6 (size=0010) #7

#8 (size=0001)

#9 #10 #11 #12(size= 0001)

#13 #14 #15

Unused

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New work item proposal Title : File allocation system with minimized

reallocation for multimedia home server Scope:To specify the data structure and the application method for file

allocation system for digital content saved on home server or media in home domain.

The method includes management tables and application systems to minimize reallocation of digital content saved on home servers, storage media or removable media in home.

NP submission: June, 2012

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Next step Network layer (second step)

Management of content within home domain

Search and identify content

Application layer (third step) Gather thumbnail image or the display width for digital

library, if needed

Specify the communication format

(e.g. XML over HTTP) Sort the content by the category for digital library

Specify XML schema or XML tag information

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User scenario The content (including e-book, photo, music and movie on

each device or media) can be visualized as each user’s digital library.

If user would like to consume digital content, all user has to do is to select the content from his/her digital library. No need to be aware of the physical location and media where

content is saved Get the volume information and storage location of removable

media

My digital library

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Timeline

File allocation system with minimized reallocation for multimedia home server

NP submission: June, 2012

Data format for visualization as digital library Target date for NP/TR: September, 2012

Identify and manage content from archived media for digital library

Target area: TBD

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Thank you for your attention.