very wrong time remaining estimation

Advertisement

andy_t_roo
Joined:
Posts:
1
Location:
North Carolina, US

very wrong time remaining estimation

when there are files to be skipped winscp gives quite a wrong estimation of the remaining time
In the linked image it is listing 4 days remaining after taking 17 mins to copy 75% (and the last 25% was all skipped files so went by in about 4 mins)

<invalid hyperlink removed by admin>
I was copying a few Gb of data, told winscp to only copy newer. - out of the several thousand files, only a small number need updating.

It looks like when winscp skips a file it doesn't subtract the size of the file from the "total amount to be transferred" - that way if i copy 1 mb at 1 mb/s , and then skip the next 99 mb (taking 9 seconds to do so), it would estimate that the remaining 100mb will take 1000 seconds (10 seconds to transfer 1mb)
potentially better estimation methods:
[list=]1mb per second transferred while active, 100mb=100 seconds;
100 mb in 10 seconds, 100mb=another 10; (probably best - that automatically takes care of the individual file transfer overhead ignored below without having to note when you actually are and are not transferring data, as above.
I'm skipping 99% of the data, and copying at 1mb/s, so 100mb should take 1 second
[/list]
Either way, saying you have 4 days left, when the first 75% of the data took 17 mins is possibly wrong.

to get that image i had skipped about 50G of data -- (win scp seems slow when copying a large number of files (12k from the one folder), but thats a quibble, not a bug) -- the actual copying speed in that example was about 4000k/s. )

win_scp build 721, on win_xp connecting to a generic linux-x86_64 server, using SFTP

edit - "disable bbcode in this post" is not checked - it still doesn't do the img link or list.

Reply with quote

Advertisement

martin
Site Admin
martin avatar
Joined:
Posts:
32,052
Location:
Prague, Czechia

Re: very wrong time remaining estimation

I wasn't able to reproduce this. How do you exactly "skip" the files?
_________________
Martin Prikryl

Reply with quote

montonero
Joined:
Posts:
10

Not sure if this is the same issue but I've seen an incorrect speed display in queue pane after the upload was delayed for several minutes due to an error.

Attached an animation with how WinSCP shows its speed (on the left) and real speed from Windows' resource monitor (on the right).

WinSCP version is 5.14.2 beta (Build 9079) but I believe I've seen this with older versions too.

winspspeed.gif

Reply with quote

martin
Site Admin
martin avatar
Joined:
Posts:
32,052
Location:
Prague, Czechia

montonero wrote:

Not sure if this is the same issue but I've seen an incorrect speed display in queue pane after the upload was delayed for several minutes due to an error.

Attached an animation with how WinSCP shows its speed (on the left) and real speed from Windows' resource monitor (on the right).

WinSCP version is 5.14.2 beta (Build 9079) but I believe I've seen this with older versions too.
Sorry for my late answer.
I have been trying to reproduce the problem, but unsuccessfully.
Can you give us step-by-step instructions?
A log file may help too (on logging level Debug 2).

Reply with quote

Advertisement

You can post new topics in this forum