File Transfer Speed Deteriorates Rapidly

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bautar
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File Transfer Speed Deteriorates Rapidly

Recently my file transfer speed will start at a good rate (~6 MB/s), but then after several files transfer, the speed will reduce to less than 1 MB/s, then go to zero and I will get the "Host is not communicating ..." message. If I restart the session, same thing happens...fast connection & file transfer speed, then bogs down after 30 seconds or so. I've read all of the posts on slow transfer speeds & what to do to improve them, but this is different.
I've been using WinSCP for years to transfer thousands of music files in a session, with few issues, but this is new. No change to PC nor operating system (Windows 10), nor changes to router.
Any insight would be appreciated.

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martin
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Re: File Transfer Speed Deteriorates Rapidly

After the "Host is not communicating" message pops up, does the transfer continue eventually, or does it stop altogether?

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bautar
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Re: File Transfer Speed Deteriorates Rapidly

Thanks for that question; I meant to add the detail. After the message pops up, the transfer will always resume after a period of several minutes, however the speed resumes at a painfully slow rate, (never restarts at ~6MB/s, more like 1MB/s or less) down to zero, then "Host is not communicating" pops up, and the cycle will continue.

My source machine is a PC running Windows 10, and the target is either a Raspberry Pi Zero-W or a Raspberry Pi 3 B+. The problem seems equal on either target machine now, and I previously never had the issue with either.

Thanks for your help!

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bautar
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Re: File Transfer Speed Deteriorates Rapidly

I just downloaded Core FTP LE and I'm trying that now. The problem is not there. File transfer speeds vary, but are generally fast, and I'm not getting any errors.

I prefer the WinSCP interface but I'll stay with Core FTP LE until we can get the issue resolved in WinSCP.

Please let me know if there's any more info (settings, etc) I can provide to help troubleshoot!

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martin
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Re: File Transfer Speed Deteriorates Rapidly

Please attach a full session log file showing the problem (using the latest version of WinSCP).

To generate the session log file, enable logging, log in to your server and do the operation and only the operation that causes the error. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.

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