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ReadyNAS Replicate SLOW on initial replication
Folks, I'm new to Replicate and have done a few test runs with it. I am finding it really SLOW in terms of replicating files between 2 servers, RN314 and RN316, both connected to my LAN. Both are ...
Let me close out this post and confirm that my attempt to plug double LAN cables into an unmanaged switch without bonding protocols caused this dramatic slowdown in Replicate performance. I had an extended call with Netgear technical support on this topic this morning and the Level 2 tech rep explained in detail what happens when two LAN cables are attached to each NIC port on the ReadyNAS. Refer to this article for more info ... http://kb.netgear.com/app/answers/detail/a_id/23076/~/what-are-bonded-adapters-and-how-do-they-work-with-my-readynas-os-6-storage
I've removed double cables on all of my boxes and all are operating as anticipated.
This item is now closed.
Yes - when I say "dual LAN cables" - I mean a cable in both of the LAN ports on the NAS going to adjacent ports on the ProSafe Switch - which in turn is driven off of the Router gateway.
Now for your requested experiment - first off, I did all of my base line replication on one LAN cable per NAS to the Switch. Transfer speeds were in the range of 50-60MB/sec. Got 300-400 GB of files moved in a few hours - about at the rate expected and pretty much consisent with the RSYNC backup to an adjacent server. A good outcome.
Next (at your suggestion), I plugged back in the second of each cables to the open LAN port on each NAS (tieing both to the ProSafe Switch). Set the reattached LAN to a static IP address (same as assigned while in DHCP mode). Relaunched Replicate. The transfer went back to Connection Method #4 - using Relayed Connection. When I checked transfer rates, they once again dropped to about 500KB/sec, compared to a rate approximatedly 100X faster when single LAN cable is attached to each box.
I think we can conclusively conclude that connecting 2 LAN cables to a router is the source of my problem that started this thread. And I think we can conclude that Replicate works, as advertised, in the initial replication effort as long as we don't double up on the LAN connections to the local network.
Many thanks for the intellectual contribution here.
Let me close out this post and confirm that my attempt to plug double LAN cables into an unmanaged switch without bonding protocols caused this dramatic slowdown in Replicate performance. I had an extended call with Netgear technical support on this topic this morning and the Level 2 tech rep explained in detail what happens when two LAN cables are attached to each NIC port on the ReadyNAS. Refer to this article for more info ... http://kb.netgear.com/app/answers/detail/a_id/23076/~/what-are-bonded-adapters-and-how-do-they-work-with-my-readynas-os-6-storage
I've removed double cables on all of my boxes and all are operating as anticipated.
This item is now closed.
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