Thank you for your reply, Harinezumi.
Currently, I’m not experiencing issues with slow speeds after connecting; I simply want to achieve the fastest one-way sync from the TS-431X3 to the TS-653A.
Where exactly is the bottleneck occurring?
Let me answer just in case.
Considering the current bottleneck, since the backup data from all three PCs goes to the TS-431X3, I believe the bottleneck is the 10G port on the TS-431X3.
When thinking about the bottleneck between the NAS devices, if I connect the NAS devices directly, they will be on a separate segment, so if I had to say, the bottleneck would be between the TS-431X3 and TS-653A?
If I connect the NAS devices through the same segment as the PCs instead of directly, as you pointed out, I think the 1G port on the TS-653A would become the bottleneck.
Are you currently considering a direct connection?
Yes, after trying various things…
I connected the TS-431X3’s 2.5G port and 1G port to the TS-653A’s two 1G ports using two CAT8 cables, set up LAC (Balance-rr, as this was the only option), and used MUT9000. When I measured the speed from the HBS RTRR server, it reached over 200mb/s. The NAS devices have IPs set outside the segment shown in the connection diagram below. My concern here is that this connection is said to be supported only for VJBOD. Although it gets disconnected several times a day, since I have 10TB, even after two days the one-way sync isn’t complete, but so far, aside from occasional disconnections, there haven’t been any other issues. I’m worried because I don’t have any knowledge about VJBOD.
I also tried LAC through a switching hub (not compatible with 802.3ad), but the speed was the same at 200mb/s. However, since other data also passes through this route, I chose to connect the NAS devices directly.
I want to know if my connection method is correct.
How is everyone else doing it?
Below is the connection diagram when the NAS devices are not directly connected.
Below are the speed measurement results.
Regarding synchronization methods, when I search online, there are so many ways to make the backup device immediately usable like the main NAS if the main NAS goes down, that I can’t tell which is best. Even with QNAP NAS, there are options like HBS, Qsync, VJBOD, synchronization using File Station, etc. To be honest, I want to know which is optimal for my case.