* Calculate Daily Change Rate Data:
* Each VM has 100GB of data.
* Daily change rate is 5%.
* For 50 VMs: 50×100×0.05=25050 \times 100 \times 0.05 = 25050×100×0.05=250 GB of daily changed data.
* Calculate Snapshot Data:
* Daily snapshots for retention of 2 weeks (14 days).
* Total snapshot data for 14 days: 250×14=3500250 \times 14 = 3500250×14=3500 GB or 3.5 TB.
* Calculate Full Data Storage:
* Each VM has 100GB.
* For 50 VMs: 50×100=500050 \times 100 = 500050×100=5000 GB or 5 TB.
* Total Storage Required:
* Sum of snapshot data and full data storage: 3.5 TB+5 TB=8.5 TB3.5 \text{ TB} + 5 \text{ TB} =
8.5 \text{ TB}3.5 TB+5 TB=8.5 TB.
* Additional Factors and Overhead:
* Typically, an overhead of approximately 60-70% of the used space is recommended to accommodate additional requirements such as metadata, system usage, and unexpected data growth.
* Adding overhead: 8.5 TB×1.6=13.6 TB8.5 \text{ TB} \times 1.6 = 13.6 \text{ TB}8.5 TB×1.6=13.6 TB.
Thus, the minimum amount of storage capacity for the remote cluster to meet the customer's data retention is approximately 14TB to 15TB.
References:
* Nutanix documentation and data protection practices.
* Considerations for overhead and additional storage needs as per standard data management best practices.