Subj : Re: File Size Issue
To   : Barry Martin
From : Ky Moffet
Date : Sat Oct 17 2020 19:14:00

BARRY MARTIN wrote:
> Hi Folks!
> 
> Putting the question here only because it involves *NIX systems.
> 
> Issue is a file greater than 1 GB does not seem to transfer.  Seems to
> be the or close to the 'magic number' cut off point: a 943.7 MB file
> transferred but a 1.4 GB did not.
> 
> Source files are on a USB thumbdrive on a Raspberry Pi 4 running
> MotionEye OS -- surveillance utility with its own operating system.  The
> files are (usually) immediately transmitted across the WiFi to the NAS.
> The NAS doesn't appear to have a problem with multi-GB files
> originating completely by wire (all Ethernet connection).
> 
> I don't think there is a size limit with transferring via WiFi but is
> there a time-out limit?  The transfer speed from the MotionEye RPi unit
> to my system (the computer I'm on currently) is rather slow, whereas
> transfering the same file after it has been transferred to the NAS is
> very quick.

If there's a limit, I'd guess it's MotionEye that's failing, not *NIX 
anything.

Timeout should not come into play unless no data is transferred for 
however long, not just because the file is big and takes a Long Time.

I'd be suspicious that maybe MotionEye caches the whole file in swap (or 
worse, in RAM) before sending it off, and when it runs out of cache 
space, that's when it fails.
 þ RNET 2.10U: ILink: Techware BBS þ Hollywood, Ca þ www.techware2k.com
        
--- QScan/PCB v1.20a / 01-0462
 * Origin: ILink: CFBBS | cfbbs.no-ip.com | 856-933-7096 (454:1/1)

.