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Content Addressed Storage (CAS). Module 3.5. Content Addressed Storage (CAS). Upon completion of this module, you will be able to: Describe the features and benefits of a CAS based storage strategy. List the physical and logical elements of CAS. - PowerPoint PPT Presentation
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© 2006 EMC Corporation. All rights reserved.
Content Addressed Storage (CAS)Content Addressed Storage (CAS)
Module 3.5
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 2
Content Addressed Storage (CAS)
Upon completion of this module, you will be able to:
Describe the features and benefits of a CAS based storage strategy.
List the physical and logical elements of CAS.
Describe the storage and retrieval process for CAS data objects.
Describe the best suited operational environments for CAS solutions.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 3
Lesson: CAS Description and Benefits
Upon completion of this lesson, you be able to:
Define CAS.
Describe the key attributes of CAS.
List the features and benefits of CAS.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 4
What is Content Addressed Storage (CAS)? Object-oriented, location-independent approach to data
storage.
Repository for the “Objects”.
Access mechanism to interface with repository.
Globally unique identifiers provide access to objects.
Extensible metadata that enables automated data management practices and applications.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 5
What Is Fixed Content?
Electronic Documents• Contracts, claims, etc.
• E-mail and attachments
• Financial spread sheets
• CAD/CAM designs
• Presentations
Digital Records
• Documents– Checks, securities trades– Historical preservation
• Photographs– Personal / professional
• Geophysical– Seismic, astronomic,
geographic
Digital Assets Retained For Active Reference And ValueDigital Assets Retained For Active Reference And Value
Leverage Historical Value
Improve Service Levels
Generate New Revenues
Rich Media
• Medical– X-rays, MRIs, CTI
• Video– News / media, movies– Security serveillance
• Audio– Voicemail– Radio
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 6
Challenges of Storing Fixed Content A significant amount of newly created information falls into
the category of fixed content.
Fixed content is growing at more than 90% annually.
Often, long-term preservation is required (years-decades).
Simultaneous multi-user online access is preferable to offline, or near-line storage.
New requirements and service level agreements have created the need for faster access to records.
Need for location independent data, enabling technology refresh and migration.
New regulations require retention and data protection.
Traditional storage methods are inadequate.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 7
Shortcomings of Traditional Archiving Solutions
Tape is slow, and standards are always changing.
Optical is expensive, and requires vast amounts of media in order to store data of any size.
Both solutions require 3rd party media management.
Many times companies retire tape products without warning.
Many times recovering files from tape and optical is time consuming.
Data on tape and optical is subject to media degradation.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 8
Benefits of CAS
Immutability and authentication
Location independence
Single instance storage
Faster record retrieval
Record-level retention, protection, and disposition
Technology independence
Online (like Disk)
Optimized TCO
Scalability
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 9
Lesson: Summary
Key points covered in this lesson:
CAS Definition
CAS Description
Benefits
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 10
Lesson: Elements of CAS
Upon completion of this lesson, you will be able to:
Describe the Physical Elements of CAS.
Describe the Logical Elements of CAS.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 11
Storage devices (CAS Based)
Servers (to which storage devices get connected)
Client
Physical Elements of CAS
API
ServerClient CAS-basedStorage
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 12
Logical Elements of CAS The Logical Elements of CAS include the Object-Level
Access Protocols.
CAS
API
API
Metadata
39HLTTT2H0404EU6M4A9MUR7TE4
Content Address
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 13
Lesson Summary
Key points covered in this lesson:
Physical Elements of CAS
Logical Elements of CAS
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 14
Lesson: Data Object Storage and Retrieval
Upon completion of this lesson, you will be able to:
Describe how data gets stored in a CAS environment.
Describe how data is retrieved from a CAS environment.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 15
How CAS Stores a Data Object
API
Application Server
Client
CAS
Object ID
Client presents datato API to be archived
1
Unique ContentAddress is calculated
2
Object is sent to CASvia CAS API over IP
3
CAS authenticates theContent Address and
stores the object
4
Acknowledgementreturned to application
5
Object-ID is retainedand stored for future use
6
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 16
How CAS Retrieves a Data Object
Application Server
Client
CAS
Object is needed byan application
1 CAS authenticatesthe request and
delivers the object
4
Application findsContent Address of
object to be retrieved
2 Retrieval request issent to the CAS via
CAS API over IP
3
API
Object ID
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 17
Lesson: Summary
Key points covered in this lesson:
How data gets stored in a CAS environment.
How data is retrieved from a CAS environment.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 18
CAS Healthcare example, Radiology PACS Solutions
Acquisition Station
• Procedure room
Image Review and Analysis on Multiple Workstations
• Viewing room • Onsite office • Surgical suite • Offsite
Images acquired and moved
Short-term Online Image Cache
Most recent studies accessible in milliseconds
Long-term Online Image ArchiveEntire patient history
accessible in seconds
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 19
Financial Example: CAS Solution
Check images maintained in tier 1 storage for 60 days then migrated via HSM to “active archive”
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 20
Module Summary
Key points covered in this module:
Benefits of CAS based storage strategy.
Overview of physical and logical elements of CAS.
Storing and retrieving data from CAS.
CAS application examples.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 21
Check Your Knowledge
What are the key features of a CAS implementation?
What are the benefits of a CAS Storage Strategy?
What are 3 business applications that would benefit from CAS technology?
What are the logical elements of a CAS system?
How does data get stored in a CAS environment?
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 22
Apply Your Knowledge
After completing this topic, you should be able to describe the features of a Centera CAS solution.
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 23
Effective Information Archive Must Address…
Business Cost
Access
Availability
Compliance
IT Backups
Consolidation
Disaster recovery
Ease of management
Compliance
Scalability
Focus needs to stay on transactional information
Secure
Simple
Affordable
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 24
Protect information at an object level Safeguard access Enforce retention and disposition intrinsically in storage layer Address business continuity and disaster recovery
Provide online access and assured authenticity Work with any application or any platform Self-manage and self-heal Be future-proof
Avoid archiving multiple copies of the same information Consolidate information silos into a unified archive Manage rapid growth in information without matching costs Provide the best overall total cost of ownership
Requirements for an Effective Information Archive
Secure
Simple
Affordable
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 25
Centera
Purpose-built for information archiving
More than 1,200 customers
400+ partners—works with any application from virtually any platform
More than 30 PB shipped
EMC Centera
Centera 4-Node for departmental use and midsize enterprises
The World’s Most Simple, Affordable, and Secure Repository forInformation Archiving
Secure
Simple
Affordable
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 26
Universal Access Makes Archiving Easy and…
Centera
Anywhere, any time, any application, from virtually any platform
Centera API
NFS
CIFS FTP
HTTP
Emulation
Simple
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 27
Centera Nodes
Disk Drives
Processor Card
Power Supply
Cooling Tunnel
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 28
Content Mirroring
Self-managedprivate LAN
Storage nodesNetworkswitch
Switch
Switch
Power rails / ATS
Simple
‘
Œ
‘
Œ
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 29
Self-Healing
Storage nodes
Œ‘
Power rails / ATS
‘
Œ
Self-managedprivate LAN
Networkswitch
Switch
Switch
Simple
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 30
Self-Healing
Storage nodes
Œ
Œ‘
Power rails / ATS
‘
Œ
‘
Self-managedprivate LAN
Networkswitch
Switch
Switch
Simple
© 2006 EMC Corporation. All rights reserved. Content Addressed Storage (CAS) - 31
Self-Managing and Configuring
No complexstorage-areanetworking
management
No filesystemmanagement
No LUN / RAIDGroup carvingor allocation
A “black box” configuration
Simple