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6433567
Guest
FTP, SFTP, SCP
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Which I saw and did. FTP is fine with me, but in order to use FTP, I needed to install and configure vsftpd — done. Encryption is unnecessary for me, for transferring files over a local network between my devices.
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6433567
Guest
FTP, SFTP, SCP
openssh-server 1:8.4p1-5+deb11u3. I didn't know it was openssh-sftp-server 1:8.4p1-5+deb11u3 installed. With WinSCP sftp speed ~7,20 - 6,20 MB/s.
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6433567
Guest
FTP, SFTP, SCP
I confused the example made with FileZilla this is FTPS, not SFTP.
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6433567
Guest
FTP, SFTP, SCP
SFTP. CPU: one core load 80–100%.
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6433567
Guest
FTP, SFTP, SCP
:~ $ "ssh -Q cipher"
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martin◆
Site Admin - Joined:
- Posts:
- 41,276
- Location:
- Prague, Czechia
Re: FTP, SFTP, SCP
I assume you have transfer speed problem, right?
As the CPU seems to be the bottleneck, did you try to use transfer queue/background transfer to make use of multiple CPU cores?
https://winscp.net/eng/docs/faq_slow#transfer_queue
As the CPU seems to be the bottleneck, did you try to use transfer queue/background transfer to make use of multiple CPU cores?
https://winscp.net/eng/docs/faq_slow#transfer_queue
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6433567
Guest
FTP, SFTP, SCP
Yes, but it's not a network problem. From what I can see. The processor core (1) is not powerful enough to process AES encryption, which slows down the transfer rate. But, if for SFTP (SSH) changing the encryption to C.20 helps. The load on the CPU core drops significantly and the file transfer speed does not drop, then for SCP (SSH) changing the encryption method from AES to C.20 does not change anything, or it doesn't change much. I did it. Nothing has changed.
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6433567
Guest
FTP, SFTP, SCP
"From what I see..." I'm not 100% sure about that. This is an assumption.
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martin◆
Site Admin
Re: FTP, SFTP, SCP
Please post logs both with defaults and C.20.
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6433567
Guest
FTP, SFTP, SCP
I opened a few folders and went out. Does it fit? D.2
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martin◆
Site Admin
Re: FTP, SFTP, SCP
There's no file transfer in the logs.
Also, please use Normal logging level for now.
Also, please use Normal logging level for now.
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6433567
Guest
FTP, SFTP, SCP
It doesn't matter that the file is downloaded from shm or USB Flash, the speed still drops to ~500-256 KB/s.
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6433567
Guest
FTP, SFTP, SCP
SCP. Guest Linux openssh 1:8.9p1-3ubuntu0.6, lan bridge, router. Downloading from guest VB.exe (host) the CPU is 40% loaded, guest the CPU is 100% loaded one core (4 cores guest), htop. I've been changing encryption methods, download speed and CPU (x4 1500MHz 86_64) the loads are identical. I forgot when I made the log that the settings for directories have been changed. The rest is default.
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6433567
Guest
FTP, SFTP, SCP
x86-64
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martin◆
Site Admin
Re: FTP, SFTP, SCP
Ok, I do not see any configuration problem in the log. So indeed it looks like the CPU is the limiting factor. Not much we can do about this atm. We plan to use better compiler in the next major release, what hopefully makes this better. But it will take time to upgrade.
- Guest
This is not a problem for me as I can also use ftp, sftp, ftps. For me, the only thing that is not clear is why there is no difference between AES and C.20 with SCP. In SFTP, there is a difference between AES and C.20 in download speed and CPU load where there is no hardware AES in the CPU. PCs have hardware AES encryption in the CPU, but hardware encryption works in the CPU, when I did the example in virtualization, I don't know.
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6433567
Guest
FTP, SFTP, SCP
I don't know how hardware encryption works in CPUs. CPU created in 2014 year.
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- Guest
PC, CPU created in 2014 year.
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6433567
Guest
FTP, SFTP, SCP
AES hardware encryption in my CPU (AMD) has.
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martin◆
Site Admin
Re: FTP, SFTP, SCP
Sorry, I do not know.
Though in your last log, there actually is a big speed difference between AES and ChaCha20 (AES being 70% faster – what might not be the expected result). And actually the speed (1,2–2 MB/s) is much higher than what you claim.
Though in your last log, there actually is a big speed difference between AES and ChaCha20 (AES being 70% faster – what might not be the expected result). And actually the speed (1,2–2 MB/s) is much higher than what you claim.
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6433567
Guest
FTP, SFTP, SCP
I can show again, but it's not required. The speed starts from high and drops to 500-200 KB/s, but rises to 200-7000 KB/s for a short time and falls again. If I take a larger example file, the speed on some segment of the downloaded file will drop to 500-200 KB/s for a constant time and the average speed will be lower in the log. I think in the log, the average download speed is shown. But I'm not sure 100%.
Everything is the same as in the previous examples 500-200 KB/s (except guest). With SFTP (ARM) between AES and C.20, not only the speed is different, but the CPU load is different. Which is not the case with SCP between AES and C.20.
Everything is the same as in the previous examples 500-200 KB/s (except guest). With SFTP (ARM) between AES and C.20, not only the speed is different, but the CPU load is different. Which is not the case with SCP between AES and C.20.
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- Guest
The guest is x86-64, not ARM.
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