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Replication Job Disconnecting Users?

Our DR site is connected to our main site by fiber that we own. A tech at the remote site is claiming that the replication job is disconnecting all their users from a file server like clockwork daily during replication. Replication for us typically consists of a few GB moving for a few minutes..

Is this even possible? the transfer rate looks to be between 20 and 80 MB/s with an average of about 40. Data between 2 and 5 GB. Sounds like throwing darts at the board to me but I thought I would ask.

  • I doubt it is the replication job itself but it maybe the traffic from replication causing some issue that makes the switch reset. How about changing the replication time to 15, 30 minutes or 2 hours later.

    Even if the disconnect follows the replication time change, I would look at the hardware.

  • Commonly we don't see this behavior (as the replications are from core to core) unless there is some form of resource contention. Core A sending data to Core B shouldn't affect a production node unless there is a shared resource somewhere that is feeling the burden. 

    Similar to Emte's suggestions, to limit the number of darts I would set the outgoing replication to say 5 MB just to see if it continues. If it does, then you at least have something to look at. If it doesn't move to 10 MB, then 20 MB just to see if it is tied to the traffic. Just as a thought I'd personally start there to eliminate that controllable variable. 

  • So it turns out the "server" being effected is actually a desktop and the "software" in question is some hand coded thing they are using and it can't tolerate any bandwidth spike.

    I have set it to run overnight until they get the software replaced and that has fixed the issue for them.

  • Ah. Gotcha. Yup, not a common problem that we see. However DP has an uncanny ability to expose numerous environmental things that we al overlook and or simply just don't know about. Either way, yeah if perhaps RR is negatively impacting the environment it is worth asking/looking to validate. Enjoy.