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What would be your primary design concerns?

You work as a design specialist at Certkiller .com. Certkiller .com has a four-member cluster that contains nine months of cellular/mobile phone provider data. The system controls network authorization, performs fraud analysis, produces reports and final billing feeds. Workloads include incoming data from cell towers and real-time account recalculation results. Network traffic continues to increase.
Mirrored BCVs and SRDF protect the data.
1. Supporting storage is spread across six Symmetrix 8430s and five Symmetrix 8530s using 36 G and 73 G drives, respectively.
2. 35.2 G meta-volumes used in a double-stripped 4×768 K configuration.
3. Cell related IOPS during peak use hours range from 12 to 30 K per array. Marketing sold consolidation to a single DXM 3000 with 146G drives using RAID 5 to reduce TCO and provide 18 months of growth.
What would be your primary design concerns?

What is THE MINIMUM number of RDF groups that have to be configured in the source Symmetrix for this solution?

A customer’s production application uses 10 servers and 40 devices E ach of the server’s accesses four production devices. A co current SRDF (SRDF-/S and SRDF/A1) solution has been proposed for application. All the production devices will be on the same symmetrix.

What is THE MINIMUM number of RDF groups that have to be configured in the source Symmetrix for this solution?

Which SRDF solution should you suggest?

A customer has a DMX3000 at Headquarters Site X. The customer currently runs two applications on the DMX3000, both of which need to be replicated for disaster recovery (DR) purposes. The customer cannot tolerate any data loss. The first application needs to be replicated to Site Y, which is 20 miles away. The second application needs to be mirrored to a different site, Site Z, which is 15 miles away.
Which SRDF solution should you suggest?