Model name: Intel(R) Celeron(R) CPU N3150 1.60GHz only HTTP manages to max out the connection whereas sftp and smb are limited by the cpu, maybe some tweaking can reduce cpu-usage for either for them.īoard: ASRock N3150B-ITX Intel N3150 mITXĬPU: Intel(R) Celeron(R) CPU N3150 1.60GHz So in my case the driver helped a bit but at the end my bottleneck is the combination of protocol+cpu. the load seemed small at 0,6 in munin but thats just the average over 5min. How can I debug this?ġ core maxes out during file copy over network. In all tests the NAS' load stayed very small.īy now my suspicion is the NAS hardware and/or linux drivers, configuration. I tried SFTP, SMB, FTP, also made no difference. I tested copying over the network from SSD to SSD, SSD to HDD, no difference (NAS has both SSD and HDD). I tested this with short cables, long cables, a dedicated 1gbit switch (instead of my gigabit router doing the routing), always the same result. It consistently copies files only at 40mb/s. I now get consistent speeds at around 110mb/s between all devices except my self-build linux NAS. So I bought new CAT6 UTP cables and tested between every device on my network.
Before posting this I read many threads/pages/blogs about networks speeds underperforming the specs.
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