Oracle Video server Bedienungsanleitung

OracleVideo Server



Introducing Oracle Video Server

Release 3.0

February 1998

Part No. A53956-02

Introducing Oracle Video Server

Part No. A53956-02

Release 3.0

Printed in the U.S.A

Primary Authors: Brian Linden, Matt Prather

Contributors: Kim Bartlett, Chris Bedford, Frances Buran, John Dowden, Gordon Furbush, Jean

Giarrusso, Dana Hausman Izenson, Lesley Kew, Liz Landreth, Ming Lee, Sue Lee, Alex Lind, Martin

McKendrick, Mason Ng, Jeffrey Olkin, Dave Pawson, Mark Porter, Pat Ritto, Daryl Rosen, Andrew

Samuels, Shawn Shyh, James Steel, Sean Trabosh, Daniel Weaver, John Zussman

The programs are not intended for use in any nuclear, aviation, mass transit, medical, or other

inherently dangerous applications. It shall be licensee's responsibility to take all appropriate fail-safe,

back up, redundancy and other measures to ensure the safe use of such applications if the Programs

are used for such purposes, and Oracle disclaims liability for any damages caused by such use of the

Programs.

This Program contains proprietary information of Oracle Corporation; it is provided under a license

agreement containing restrictions on use and disclosure and is also protected by copyright patent and

other intellectual property law. Reverse engineering of the software is prohibited.

The information contained in this document is subject to change without notice. If you ﬁnd any problems

in the documentation, please report them to us in writing. Oracle Corporation does not warrant that this

document is error free.

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Alternate III (June 1987). Oracle Corporation, 500 Oracle Parkway, Redwood City, CA 94065.

Oracle Video Server, Oracle Video Client, Oracle Video Server Manager, Oracle Media Data Store, Oracle

Power Objects, and Oracle Forms are trademarks of Oracle Corporation. Oracle is a registered trademark

of Oracle Corporation.All other products or company names are used for identiﬁcation purposes only,

and may be trademarks of their respective owners.All other products or company names are used for

identiﬁcation purposes only, and may be trademarks of their respective owners.

iii

Contents

Send Us Your Comments

...................................................................................................................

Preface

............................................................................................................................................................

Chapter 1 Concepts

What Is Streamed Digital Video?

....................................................................................................

1-1

How Is Streamed Video Better than Traditional Media?........................................................

1-2

What Is a Digital Video Server?

.......................................................................................................

1-4

What is the Oracle Video Server?...............................................................................................

1-5

OVS within the Network Computing Architecture (NCA) ............................................

1-5

Tier 1: Client...........................................................................................................................

1-6

Oracle Video Client:.......................................................................................................

1-6

Oracle Video Server Manager: .....................................................................................

1-6

Tier 2: Application Server ....................................................................................................

1-6

Tier 3: Data Server.................................................................................................................

1-7

Server Layer ...........................................................................................................................

1-7

Cartridge Layer......................................................................................................................

1-7

Communication Layer..........................................................................................................

1-7

What is a Digital Video Client?

........................................................................................................

1-7

Customizing the Video Client ....................................................................................................

1-8

What Are the Challenges of Digital Video?

..................................................................................

1-8

How Is Digital Video Used?

.............................................................................................................

1-9

Clips and Logical Content...........................................................................................................

1-9

Real-Time Feeds..........................................................................................................................

1-11

Where is Digital Video Used?

........................................................................................................

1-11

Broadband

...................................................................................................................................

1-11

Asynchronous Transfer Mode (ATM)..............................................................................

1-12

Digital Subscriber Line (DSL) Transport Systems..........................................................

1-12

Enterprise

....................................................................................................................................

1-13

Internet

.........................................................................................................................................

1-14

Putting It Together: The Video Round Trip

.................................................................................

1-15

All Environments........................................................................................................................

1-15

1. Client Tier..................................................................................................................

1-15

2. Network.....................................................................................................................

1-15

3. Application Server Tier ...........................................................................................

1-15

4. Data Server Tier (Optional).....................................................................................

1-15

Scenario 1: Broadband Environment .......................................................................................

1-16

Scenario 2: Enterprise Environment.........................................................................................

1-18

Scenario 3: Internet Environment.............................................................................................

1-19

Beyond the Basics

.............................................................................................................................

1-20

Maintaining an OVS System .....................................................................................................

1-20

Creating Applications ................................................................................................................

1-21

Chapter 2 System Architecture

Oracle Video Server (OVS)

...............................................................................................................

2-2

Content...........................................................................................................................................

2-2

Physical Content....................................................................................................................

2-2

Compression Formats....................................................................................................

2-2

MPEG (Motion Pictures Experts Group) ....................................................................

2-3

Container (Mux) Formats..............................................................................................

2-3

MPEG-1 System and MPEG-2 Transport....................................................................

2-3

RKF (Raw Key Frame) Container Formats.................................................................

2-4

Tag Files...........................................................................................................................

2-4

One-Step Encoding.........................................................................................................

2-4

Continuous Real-Time Feeds........................................................................................

2-5

Logical Content......................................................................................................................

2-5

Storage............................................................................................................................................

2-6

Real-Time Access...................................................................................................................

2-6

Files..........................................................................................................................................

2-6

Write Consistency ..........................................................................................................

2-7

Volumes..................................................................................................................................

2-7

Striping ............................................................................................................................

2-7

RAID (Redundant Arrays of Inexpensive Disks) Protection...................................

2-8

Space Allocation...........................................................................................................

2-10

Spare Disks....................................................................................................................

2-11

MDS Utilities........................................................................................................................

2-12

HSM (Hierarchical Storage Management).......................................................................

2-12

HSM Utilities.................................................................................................................

2-12

Remote Access .....................................................................................................................

2-13

Delivery........................................................................................................................................

2-13

Requesting Video ................................................................................................................

2-13

Rate Control .........................................................................................................................

2-14

Real-Time Feeds...................................................................................................................

2-14

Scheduled Video..................................................................................................................

2-14

Looping Content..................................................................................................................

2-14

Network .......................................................................................................................................

2-15

Oracle Video Server Manager (VSM)

...........................................................................................

2-15

Graphical User Interface............................................................................................................

2-15

Oracle Media Net

..............................................................................................................................

2-16

Clients and Servers.....................................................................................................................

2-16

Objects, Interfaces, and Servers................................................................................................

2-17

Scalability and Load Balancing.................................................................................................

2-17

Logging Error and Warning Messages....................................................................................

2-17

Oracle Video Client (OVC)

.............................................................................................................

2-18

Application Development.........................................................................................................

2-18

Run-Time Capability..................................................................................................................

2-19

OVS System Hardware and Network Architecture

...................................................................

2-20

How the OVS System Communicates

..........................................................................................

2-21

Circuits.........................................................................................................................................

2-21

Sessions ........................................................................................................................................

2-21

Sessions in Symmetric Networks......................................................................................

2-22

Sessions in Asymmetric Networks ...................................................................................

2-23

How Client Devices Connect to the OVS................................................................................

2-23

How the OVS Delivers Video...................................................................................................

2-24

Components of Oracle Video Server and Oracle Media Net

...................................................

2-25

Oracle Media Net ORB Daemon...............................................................................................

2-26

Oracle Media Net Name Server................................................................................................

2-26

Oracle Media Net Address Server............................................................................................ 2-26

Oracle Media Net Event Logging Daemon............................................................................. 2-27

Oracle Media Net Event Log Reader ....................................................................................... 2-27

Oracle Media Net CORBA Event Service................................................................................ 2-27

Oracle Media Net CORBA Naming Service ........................................................................... 2-28

Session and Circuit Service........................................................................................................ 2-28

Oracle MDS Directory Service.................................................................................................. 2-28

Oracle MDS Remote File Service.............................................................................................. 2-29

Oracle MDS FTP Service............................................................................................................ 2-29

HSM Service ................................................................................................................................ 2-29

HSM Transfer Service................................................................................................................. 2-29

Stream Service............................................................................................................................. 2-29

Video Pump................................................................................................................................. 2-30

Real-Time Feed Service.............................................................................................................. 2-30

Content Service ........................................................................................................................... 2-30

Broadcast Data Service............................................................................................................... 2-31

Scheduler Service........................................................................................................................ 2-31

NVOD Exporter Service............................................................................................................. 2-31

Networking in the OVS System..................................................................................................... 2-31

PSTN............................................................................................................................................. 2-32

LAN .............................................................................................................................................. 2-32

Ethernet................................................................................................................................. 2-33

Packets............................................................................................................................ 2-33

Bus/Broadcast Topology ............................................................................................ 2-33

Best-Effort Delivery...................................................................................................... 2-34

Demands of Video on LANs.............................................................................................. 2-34

Broadband Network................................................................................................................... 2-35

Index

vii

Figures

1–1 Traditional digital video vs. streamed digital video........................................................ 1-3

1–2 Oracle Network Computing Architecture......................................................................... 1-6

1–3 Logical content assembled to create a single cartoon show.......................................... 1-10

1–4 A basic video round trip..................................................................................................... 1-16

1–5 Typical ATM network for the broadband delivery environment................................ 1-17

1–6 An enterprise (Switched Ethernet) OVS system............................................................. 1-18

2–1 Logical content and physical content................................................................................. 2-5

2–2 A stripe.................................................................................................................................... 2-7

2–3 A striped volume................................................................................................................... 2-8

2–4 A RAID stripe......................................................................................................................... 2-9

2–5 A RAID set with parity stripes............................................................................................ 2-9

2–6 MDS Volume Showing Space Allocations....................................................................... 2-11

2–7 Remote file transfer to MDS through MDS FTP server ................................................. 2-13

2–8 OVS system hardware........................................................................................................ 2-20

2–9 Communication in a symmetric network........................................................................ 2-22

2–10 Communication in an asymmetric network.................................................................... 2-23

2–11 An OVS system round trip................................................................................................. 2-24

2–12 Components of Oracle Video Server and Oracle Media Net........................................ 2-25

viii

Send UsYour Comments

Introducing Oracle Video Server, Release 3.0

Part No. A53956-02

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