White Papers

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NetworkBandwidth
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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
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Theseratesaretheoreticalmaximums,andactualthroughputcanbesu bstantially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)
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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.
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