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18 Cards in this Set
- Front
- Back
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Recovery Point Objective (RPO) |
The maximum tolerable period in which data might be lost |
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Recover Time Objective (RTO) |
The time it takes to recover a service / application |
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SRDF/Star |
Multi-site Replication Option |
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SRDF/CE |
Cluster Enabler Option |
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SRDF/AR |
Automated Replication Option |
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SRDF/CG |
Consistency Groups |
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What technology does SRDF uses to maintain the differential between source and target devices. |
track tables |
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SRDF link configuration that setups up a one-way mirror relationship |
Unidirectional |
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A two-way mirror relationship where data moves in both directions on the SRDF links in this link configuration. |
Bidirectional |
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An extended distance link configuration with two unidirectional SRDF RA groups, primary and secondary, in each Symmetrix system. |
Dual-directional |
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Operation mode that provides real-time mirroring of data between the source and target systems |
Synchronous Replication (SRDF/S) |
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Operation mode transfers data from the source devices to the remote devices without waiting for an acknowledgment |
Adaptive Copy Replication (SRDF/DM) |
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Operation mode that places host writes into 'cycles' or 'chunks' and then transfers and entire chunk to the target system. |
Asynchronous Replication (SRDF/A) |
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What would you use if you have several devices needing remote replication that belong to an entire application stack of sever databases, webserver, etc. |
SRDF/Consistency Groups |
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Primary SRDF device |
R1 (source) |
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Target SRDF device |
R2 (target) |
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Which SRDF mode requires additional cache and why does it need it? |
SRDF/Asynchronous (SRDF/A). It needs this to support Delta Sets. |
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When sizing cache and bandwidth requirements for SRDF/A, what two factors should be considered? |
Cache and bandwidth must be sized based on the workload and desired RPO |
