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.

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Presentation transcript:

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 Vaulting Tape On-site Tape Back-up Off - site (trucks) Disk Consolidation More Less Delayed Immediate Mission Critical Applications Less Amount of Data Recovery Time Importance of Data -site - -up GDPS/STP Metro Mirror Global Mirror Global Copy Tier 7 Tier 6 Global Mirror for zSeries Tier 4 Critical Applications Non Critical Applications Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt 1

Disaster Recovery Concepts Recovery Point Objective (RPO) Recovery Point Objective (RPO) – Point in time to which applications data must be recovered to resume business transactions Recovery Time Objective (RTO) Recovery Time Objective (RTO) – Maximum elapsed time required to complete recovery of application data SecsMinsHrsDays WksSecsMinsHrsDays Wks Recovery Point Recovery Time Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt 2

Tape Backup SecsMinsHrsDays WksSecsMinsHrsDays 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 3

Tape Restore SecsMinsHrsDays WksSecsMinsHrsDays 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 Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt 4

Synchronous Mirroring SourceTarget 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 MAN WAN MAN WAN DS3, OC- 3/12/48 STM-1/4/16 DS3, OC- 3/12/48 STM-1/4/16 OR OC-3/12/48 STM-1/4/16 OC-3/12/48 STM-1/4/16 CN 2000

Asynchronous Mirroring MAN WAN MAN WAN DS3, OC- 3/12/48 STM-1/4/16 DS3, OC- 3/12/48 STM-1/4/16 OR OC-3/12/48 STM-1/4/16 OC-3/12/48 STM-1/4/16 CN 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 Sumber Kepustakaan : collaboration.greatplains.net/wiki/images/a/aa/SAN101.ppt 6