determining bc/dr methods recovery time objective – (rto) time needed to recover from a disaster...
TRANSCRIPT
Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt
1
Determining BC/DR Methods Recovery Time Objective – (RTO)
Time needed to recover from a disaster
How long can you afford to be without your systems
Recovery Point Objective – (RPO)
Age of the data you want the ability to restore in the event of a disaster
Any data created or modified inside your recovery point objective will be either lost or must be recreated during a recovery
Network Recovery Objective – (NRO)
Time required to recover or fail over network operations
Completely Duplicated/Interconnected hot-site
Remote Disk Mirroring
Disk Mirroring
Shared Disk
Single Disk Copy
Electronic VaultingTape On-site
Tape Back-upOff-site (trucks)
Disk Consolidation
More
LessDelayed
Immediate
Mission CriticalApplications
LessAmountof Data
RecoveryTime
Importance ofData
-site
-site-up
GDPS/STP
Metro Mirror
Global Mirror
Global Copy
Tier 7
Tier 6
Global Mirror for zSeries
Tier 4
CriticalApplications
Non CriticalApplications
Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt
2
Disaster Recovery Concepts
• Recovery Point Objective (RPO) –
Point in time to which applications data must be recovered to resume business transactions
• Recovery Time Objective (RTO) –
Maximum elapsed time required to complete recovery of application data
SecsMinsHrsDays Wks Secs Mins Hrs Days Wks
Recovery Point Recovery Time
Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt
3
Tape Backup
SecsMinsHrsDays Wks Secs Mins Hrs Days Wks
Recovery Point Recovery Time
Recovery Point Objective (RPO)
• Business needs drive the technology choice
Synchronous Replication
Periodic Replication
Asynchronous Replication
Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt
4
Tape Restore
SecsMinsHrsDays Wks Secs Mins Hrs Days Wks
Recovery Point Recovery Time
Recovery Time Objective (RTO)
• Business needs drive the technology choice
Recovery Time includes:• Fault detection
• Recovering data
• Bringing apps back online
Global Clustering Manual
Migration
Synchronous Mirroring
Source Target
I/O write received from host / server into cache of source
I/O is transmitted to the cache of the target
Receipt acknowledgment is provided by target back to cache of source
Ending status is presented to host / server
MANWANMANWAN
DS3, OC-3/12/48
STM-1/4/16
DS3, OC-3/12/48
STM-1/4/16
OROR
OC-3/12/48STM-1/4/16
OC-3/12/48STM-1/4/16
CN 2000CN 2000 CN 2000CN 2000
Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt
6
Asynchronous Mirroring
MANWANMANWAN
DS3, OC-3/12/48
STM-1/4/16
DS3, OC-3/12/48
STM-1/4/16
OROR
OC-3/12/48STM-1/4/16
OC-3/12/48STM-1/4/16
CN 2000CN 2000 CN 2000CN 2000
Source Target
Ending status is presented to host / server
I/O write received from host / server is collected into Source
Source sends only final set of updates to target
Target receives updates and applies the writes to the volume