Filezilla sftp download speed low4/15/2023 Perhaps an FFS setting or something to do for the next update?ĮDIT: Corrected in the new version, I quote the Dev/Admin: "I've done a few tests and it turns out FFS does indeed have an SFTP perf issue with single connections! Luckily it's one that is easily fixed by increasing the buffer sizes. I think I found a lot of person with a similar problem:īut I never found a clear solution or simply don't work for me.Īlready have a look at the FAQ and find nothing.įor now, I can't have more than ~5.5 MB/Mo download speed when I should have ~12.5 MB/Mo download speed (because of the lower part of my connection is the server internet connection). Possible reasons for the observed issue: - The server is overloaded and its FTP server divides available capacity roughly equal to many connections. I use an SFTP connection in FFS to connect to the server Latency isn't the problem, the default settings in FileZilla allow for 100Mbit at 300ms. my HDD local is a 7200RPM in SATA3, so ~350 MB/Mo write speed there is no download or upload on the server at the same time Most SFTP clients (including WinSCP) overcome the problem by both requesting/sending a large chunk of the file in each single read/write request and by sending (queuing) multiple requests without waiting for a response to previous. the bandwidth of the server is not limited If the client spends this time uselessly waiting, your transfer speed will be low. When I download an ISO image (which is around 4GB) from the server I get around 70MBps of download speed (which actually is the maximum upload speed of that server) with FileZilla client. the server has 100Mb (~12.5 MB/Mo) internet connection I'm connecting to a FileZilla Server v0.9.60beta using FileZilla Client v3.40.0 and WinSCP v5., in both cases with an implicit FTPS connection. my internet connection is 300Mb (~37.5 MB/Mo) in RJ45 I have a download speed limitation when I try to download a list of files from my server with FreeFileSync.
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