IBM DS8000存储复制技术
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application availability and storage IT personnel productivity
2
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Asynchronous mirroring (global) DS8000, DS6000, ESS, N series, SVC, DS4000
Three site synchronous and asynchronous mirroring DS8000, ESS, N series
►
Virtualization
Match disaster recovery cost to the value of the data Help reduce backup window times Help improve storage IT personnel productivity
IBM Disk Replication is designed to provide TCO savings through high
A BC ABC
►
No change in logical appearance of target volume to applications
Track Table
Storage Controller Cache
Disk Subsystem
Track Table
Once tracks are copied
Local Site DS8000, DS6000, ESS
Rem ote Site DS8000, DS6000, ESS
Multiple target FlashCopy
Source S1
Target T1 Target T2 Target T3
SAN Volume Controller implementation:
© 2007 IBM Corporation
Business Continuity TOP GUN
IBM’s Enabling Technologies: Storage Replication for the DS Family
Understanding DS8000 Storage Replication Provides foundation for understanding all other IBM Storage Replication
Point-in-time Copy (FlashCopy)
FlashCopy NOCOPY Complete Copy on W rite
Physical disk
How does Point in Time Copy work?
► ►
Request copy from source to target FlashCopy relationship created between the volumes Create copy of track table in storage controller cache (can be done very quickly) Target volume is available for processing (including write) once the relationship is created
Source Volume
Target Volume
►
AB C
►
Background NOCOPY
► ►
Track Table
Storage Controller Cache
Disk Subsystem
Track Table Created
►
Copy on Write:
►
I/O in Server Memory
Background copy complete
Physical disk
Background COPY
►
Source olume
Target Volume
If specified, FlashCopy moves physical data tracks from the source to the target, in the background
Midrange
NAS/iSCSI
Enterprise
SVC
Entry
N3700
.
DS3000
DS4100 DS4300
DS4500 DS4800
N5000 N7000
ESS
DS6000
DS8000
7
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Do not do physical background copy of data Attempts to read a target track intercepted and data obtained from source No change in logical appearance of target volume to applications
4
B’
Server
► ►
When writing to a source track Write is intercepted and source track physically copied to target Then update write IO allowed to proceed
© 2007 IBM Corporation
© 2007 IBM Corporation
Business Continuity TOP GUN
IBM Metro Mirror
1. Application sends a write request 2. Data written to remote disk cache 4. W rite complete signal to the application
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Business Continuity TOP GUN
Why use Disk Storage Replication?
► ► ► 6
Business Continuity TOP GUN
IBM Disk Mirroring Technologies
Metro Mirror
► ►
Global Mirror
► ►
Metro / Global
Mirror
►
Synchronous mirroring (campus) DS8000, DS6000, ESS, N series, SAN Volume Controller (SVC), DS4000
3
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
© 2007 IBM Corporation
Business Continuity TOP GUN
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
© 2007 IBM Corporation
Space Efficient FlashCopy
What is Metro Mirror?
►
Originally known on ESS as Peer to Peer Remote Copy (PPRC)
► ► ►
Synchronous mirror of data volumes to a remote location Suspend / resume capability Available on:
Business Continuity TOP GUN
October, 2007 – Shanghai, China
Understanding IBM Storage Replication
Xu Yuan IBM ATS xuyuan@
© 2007 IBM Corporation
► ►
FlashCopy implementation fundamentally same as DS8000 Not all DS8000 functions available Available today on DS4000 Available today on N series, very robust implementation, more in separate section in this lecture S.E. FlashCopy not currently available on DS8000, but planned for 4Q07
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Business Continuity TOP GUN
Point-in-time Copy (FlashCopy)
● Use when target volume will be used for many writes ● Use when desire later to FlashCopy back to source ● When desired to later FlashCopy the target volume
Selected other FlashCopy functions, implementations
Inband FlashCopy
► ►
A Prim ary Remote copy link B Secondary C FlashCopy Target
Send Flashcopy to remote LUN Over remote copy link
Protect against - Data corruption: Point in Time Copy - Data loss: Remote Copy or PiT Copy
Reduce Business Risk by …
Maintain access to data at all times
Server
5
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
© 2007 IBM Corporation
Business Continuity TOP GUN
► ►
Continuous data access during backups Data/application recovery from a disaster
Protect critical business data
►
Meet regulatory, audit, governance requirements
► ►
The FlashCopy relationship ends Target volume is now free of any FlashCopy restrictions
● Example: can now Flashcopy the former target volume back on the original source volume
2
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Asynchronous mirroring (global) DS8000, DS6000, ESS, N series, SVC, DS4000
Three site synchronous and asynchronous mirroring DS8000, ESS, N series
►
Virtualization
Match disaster recovery cost to the value of the data Help reduce backup window times Help improve storage IT personnel productivity
IBM Disk Replication is designed to provide TCO savings through high
A BC ABC
►
No change in logical appearance of target volume to applications
Track Table
Storage Controller Cache
Disk Subsystem
Track Table
Once tracks are copied
Local Site DS8000, DS6000, ESS
Rem ote Site DS8000, DS6000, ESS
Multiple target FlashCopy
Source S1
Target T1 Target T2 Target T3
SAN Volume Controller implementation:
© 2007 IBM Corporation
Business Continuity TOP GUN
IBM’s Enabling Technologies: Storage Replication for the DS Family
Understanding DS8000 Storage Replication Provides foundation for understanding all other IBM Storage Replication
Point-in-time Copy (FlashCopy)
FlashCopy NOCOPY Complete Copy on W rite
Physical disk
How does Point in Time Copy work?
► ►
Request copy from source to target FlashCopy relationship created between the volumes Create copy of track table in storage controller cache (can be done very quickly) Target volume is available for processing (including write) once the relationship is created
Source Volume
Target Volume
►
AB C
►
Background NOCOPY
► ►
Track Table
Storage Controller Cache
Disk Subsystem
Track Table Created
►
Copy on Write:
►
I/O in Server Memory
Background copy complete
Physical disk
Background COPY
►
Source olume
Target Volume
If specified, FlashCopy moves physical data tracks from the source to the target, in the background
Midrange
NAS/iSCSI
Enterprise
SVC
Entry
N3700
.
DS3000
DS4100 DS4300
DS4500 DS4800
N5000 N7000
ESS
DS6000
DS8000
7
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Do not do physical background copy of data Attempts to read a target track intercepted and data obtained from source No change in logical appearance of target volume to applications
4
B’
Server
► ►
When writing to a source track Write is intercepted and source track physically copied to target Then update write IO allowed to proceed
© 2007 IBM Corporation
© 2007 IBM Corporation
Business Continuity TOP GUN
IBM Metro Mirror
1. Application sends a write request 2. Data written to remote disk cache 4. W rite complete signal to the application
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Business Continuity TOP GUN
Why use Disk Storage Replication?
► ► ► 6
Business Continuity TOP GUN
IBM Disk Mirroring Technologies
Metro Mirror
► ►
Global Mirror
► ►
Metro / Global
Mirror
►
Synchronous mirroring (campus) DS8000, DS6000, ESS, N series, SAN Volume Controller (SVC), DS4000
3
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
© 2007 IBM Corporation
Business Continuity TOP GUN
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
© 2007 IBM Corporation
Space Efficient FlashCopy
What is Metro Mirror?
►
Originally known on ESS as Peer to Peer Remote Copy (PPRC)
► ► ►
Synchronous mirror of data volumes to a remote location Suspend / resume capability Available on:
Business Continuity TOP GUN
October, 2007 – Shanghai, China
Understanding IBM Storage Replication
Xu Yuan IBM ATS xuyuan@
© 2007 IBM Corporation
► ►
FlashCopy implementation fundamentally same as DS8000 Not all DS8000 functions available Available today on DS4000 Available today on N series, very robust implementation, more in separate section in this lecture S.E. FlashCopy not currently available on DS8000, but planned for 4Q07
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
Business Continuity TOP GUN
Point-in-time Copy (FlashCopy)
● Use when target volume will be used for many writes ● Use when desire later to FlashCopy back to source ● When desired to later FlashCopy the target volume
Selected other FlashCopy functions, implementations
Inband FlashCopy
► ►
A Prim ary Remote copy link B Secondary C FlashCopy Target
Send Flashcopy to remote LUN Over remote copy link
Protect against - Data corruption: Point in Time Copy - Data loss: Remote Copy or PiT Copy
Reduce Business Risk by …
Maintain access to data at all times
Server
5
This educational piece is intended for your use in selling. It is NOT a deliverable for your customers.
© 2007 IBM Corporation
Business Continuity TOP GUN
► ►
Continuous data access during backups Data/application recovery from a disaster
Protect critical business data
►
Meet regulatory, audit, governance requirements
► ►
The FlashCopy relationship ends Target volume is now free of any FlashCopy restrictions
● Example: can now Flashcopy the former target volume back on the original source volume