We have a customer how has a 10Gb Sat link between the HQ and the DR site. They are having latency issues when copying backup transactional data between the HQ and DR site. On a 10gb WAN link, the 4/5 gb of backup takes more than an hour. The WAN is connected via Cisco Router and the routers are not doing any kind of traffic filtering or policing.
I noticed that the “Jumbo Frames” are enabled (on the network equipment?) in HQ, but not at the DR.
Could this possibly allow the Customer to have good experiences locally in HQ – but then compromised when data is transferred externally to the non-Jumbo Frame site?
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It's a little unclear what the "latency issues" are. Are you saying there's latency issues when doing the backup or latency issues because of the backup? If the former, ever read or hear the late Grace Hopper's explanation of using satellite connection? The latter is often resolved with QoS.
Also if the former, backup impacted by latency, google BDP or bandwidth delay product.
Non jumbo frames support end-to-end shouldn't be an issue assuming there's L3 end-to-end as normally PMTUD would discover the maximum MTU end-to-end although having such support end-to-end would likely increase you backup transfer performance.
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