How is the FTP transfer of multiple selected files implemented

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cybercowboy
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How is the FTP transfer of multiple selected files implemented

Post by *cybercowboy »

Do they go as individual file transfers one at a time or do they go across in one transfer to a temp file, then are broken up when all the data is transferred?
We are trying to explain frequent failures when transferring multi selected files.
I have an old piece of equipment from the late nineties and was warned about "sending multiple files"
they say "do one at a time", because if the multiple files go as one transfer, FTP server may not have space
for the aggregate temp file. Hate to have to give up multiple selections.
So I need to know this to determine if we need to stop using multiple file selections and do one at a time.
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Horst.Epp
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Re: How is the FTP transfer of multiple selected files implemented

Post by *Horst.Epp »

They are transfered one after the other.
Nothing parallel or packed.
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Usher
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Re: How is the FTP transfer of multiple selected files implemented

Post by *Usher »

Horst.Epp wrote: 2021-06-27, 07:49 UTC Nothing parallel or packed.
Another unclear answer.
Multiple files aren't packed in a single archive, but there is an option to compress (pack) every file separately using mode Z during transfer.

FTP provides also other data transfer modes, see Wikipedia: https://en.wikipedia.org/wiki/File_Transfer_Protocol#Data_transfer_modes
They aren't described in TC Help so TC probably doesn't support them.
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Horst.Epp
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Re: How is the FTP transfer of multiple selected files implemented

Post by *Horst.Epp »

Usher wrote: 2021-06-27, 12:03 UTC
Horst.Epp wrote: 2021-06-27, 07:49 UTC Nothing parallel or packed.
Another unclear answer.
Multiple files aren't packed in a single archive, but there is an option to compress (pack) every file separately using mode Z during transfer.

FTP provides also other data transfer modes, see Wikipedia: https://en.wikipedia.org/wiki/File_Transfer_Protocol#Data_transfer_modes
They aren't described in TC Help so TC probably doesn't support them.
Packing with Mode Z doesn't change anything regarding to the question of the poster.
Again, Files are transfered one after the other.
I don't know what problem you have to read the question and my answer.
I don't like your behaviour but that isn't the topic here.
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HerbieH
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Re: How is the FTP transfer of multiple selected files implemented

Post by *HerbieH »

Support.

Horst.Epp wrote to Usher:
I don't know what problem you have to read the question and my answer.
I don't like your behaviour but that isn't the topic here.
To Usher:
I think it is sad, that you, a person with such an excellent knowledge of TC, again and again uses your energy to 'offend' other forum users.

To all users:
I like TC and I like this forum. :D
Have learned a lot from reading it, an I am using many of the ideas and suggestions.
Everybody, keep up the good work. :P
HerbieH*
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Usher
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Re: How is the FTP transfer of multiple selected files implemented

Post by *Usher »

2Horst.Epp
You said "Nothing parallel or packed."
For me it means:

1. You can't send anything in parallel.
and
2. You can't send anything packed.

However, you CAN send any file packed on-the-fly separately in mode Z.
It means that phrase 2 is FALSE and the whole phrase (1 and 2) is also FALSE.
That's how my logic works.

Maybe there's something wrong with my English… Could you provide your logical explanation, please?
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Re: How is the FTP transfer of multiple selected files implemented

Post by *Horst.Epp »

Usher wrote: 2021-07-04, 00:16 UTC 2Horst.Epp
You said "Nothing parallel or packed."
For me it means:

1. You can't send anything in parallel.
and
2. You can't send anything packed.

However, you CAN send any file packed on-the-fly separately in mode Z.
It means that phrase 2 is FALSE and the whole phrase (1 and 2) is also FALSE.
That's how my logic works.

Maybe there's something wrong with my English… Could you provide your logical explanation, please?
If you send a file packed with mode Z doesn't mean you have more than one transfer in parallel.
But its useless to discuss with you.
Search another target for you hate speech please.
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j7n
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Re: How is the FTP transfer of multiple selected files implemented

Post by *j7n »

FTP requires opening of a new connection for every file, and the port number is incremented. The connections usually remain in a closing state for some minutes, and could overwhelm the network protocol stack of a very limited device, or a small reserved port range could get exhausted. Sending a packed archive might be more reliable.

Do not concern with Mode Z. Only very complete FTP implementations have it, and it requires additional resources. Bandwidth is hardly ever an issue, but the round-trip lag of opening connections is.

This nit-picking of "or" logic does not add to the main topic of the thread. Replies of Usher are a reason why I don't post on this forum.
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