Dell PowerVault DL2100 - Manual (Page 12)

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Network Bandwidth
Another key factor in sizing your data protection environment using Continuous Protection Server is the available
network bandwidth for backup operations. Network bandwidth is dependent on the type of network deployed in
the data protection environment. The theoretical maximum network throughput values are as follows:
• 10/100 Ethernet: 1.0 MB/sec – 10 MB/sec
• Gigabit Ethernet (GbE): 100 MB/sec
These rates are theoretical maximums, and actual throughput can be substantially less. A conservative estimate is
to assume that the amount of data that can be transferred is 70% of the theoretical maximum. Applying 70% to the
theoretical maximums gives the following network performance:
• 10/100 Ethernet: 0.7 MB/sec – 7 MB/sec (42 MB/min – 420 MB/min)
• Gigabit Ethernet (GbE): 70 MB/sec (4.2 GB/min)
It is important to compare the amount of data that can be transmitted over the backup network with the amount of
data that is expected to change and be protected over that network. When making this comparison, it is
recommended to use the conservative estimate for the maximum amount of network bandwidth available to
account for items such as latency and overhead. If the network bandwidth is unable to meet the requirements for
the amount of data being protected, additional networks or network interfaces may be required to support the
throughput requirements to protect the data.